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methamphetamine

B2 noun #27 最常用 12分钟阅读

methamphetamine

前27

开始练习例句笔记与提示 methamphetamine 30秒了解

解析 methamphetamine in your Level:

Methamphetamine is a very strong and dangerous drug. It is a chemical that people make in labs. It is not like medicine that you buy for a cold. When people use it, they feel very awake and happy for a short time, but then they feel very sick. It is bad for the heart and the brain. In most countries, it is against the law to have this drug. You might hear about it on the news when the police find it. It is a very long word, but you can think of it as a 'bad chemical'. Doctors almost never use it because it is so dangerous. It can make people act very strange and hurt themselves or others. It is important to stay away from it because it is very easy to get addicted, which means you cannot stop using it even if you want to. Most people just call it 'meth' because the full word is hard to say. However, in school or on TV, they use the long name to be very serious. It is a word that describes something that causes many problems for families and cities.

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Methamphetamine is a powerful stimulant drug. A stimulant is something that makes your body and brain go faster. While some stimulants like caffeine are in coffee, methamphetamine is much stronger and very illegal. It is a synthetic drug, which means it is made by people using chemicals, not found in nature. People who use it might feel like they have a lot of energy, but the drug is actually damaging their body. It can cause problems with teeth, skin, and the heart. In many places, the police work hard to stop people from making or selling methamphetamine. You might see this word in a newspaper or a health book. It is a noun, and it is usually uncountable. For example, you would say 'The police found methamphetamine,' not 'a methamphetamine'. It is a serious word for a serious problem. Because it is so addictive, many countries have strict laws against it. If a doctor uses it, it is only for very rare medical reasons, and they watch the patient very closely. Most of the time, when you hear this word, it is about something illegal and dangerous.

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Methamphetamine is a potent synthetic stimulant that is primarily known for its highly addictive nature and its impact on the central nervous system. It belongs to a class of drugs called amphetamines, but it is much stronger than the ones usually prescribed for health issues. Methamphetamine increases the amount of dopamine in the brain, which is a chemical that makes you feel pleasure. However, because it releases so much dopamine, it can quickly damage the brain's ability to feel pleasure naturally. This leads to a cycle of addiction that is very difficult to break. In many parts of the world, methamphetamine is a major public health concern. It is often produced in illegal laboratories using common household chemicals and precursors like pseudoephedrine. The word itself is quite formal and technical. In casual conversation, people might use slang terms, but in a professional or academic setting, 'methamphetamine' is the correct term. You will often find it used in the context of law enforcement, medical reports, and social work. Understanding this word is important for following news stories about drug policy and community health initiatives.

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Methamphetamine is a highly addictive synthetic stimulant that significantly alters brain chemistry by increasing the levels of neurotransmitters like dopamine and norepinephrine. As a CEFR B2 learner, you should recognize this as a technical term used in medical, legal, and sociological contexts. While it has a limited therapeutic use for conditions like ADHD and extreme obesity under the brand name Desoxyn, it is predominantly encountered as an illicit substance. The drug's ability to cross the blood-brain barrier rapidly makes it more potent than standard amphetamines. Chronic use can lead to severe physical and psychological consequences, including neurotoxicity, cardiovascular collapse, and 'methamphetamine-induced psychosis,' where individuals lose touch with reality. In writing, 'methamphetamine' is an uncountable noun. It is frequently used in collocations such as 'methamphetamine abuse,' 'methamphetamine production,' and 'methamphetamine addiction.' The word carries a heavy social stigma due to its association with crime and the devastating impact it has on users' lives. When discussing this topic, it is crucial to maintain a formal register and use the full chemical name to ensure clarity and professionality, especially when analyzing the socioeconomic factors that contribute to the drug's prevalence in certain regions.

Methamphetamine is a potent sympathomimetic agent and a member of the phenethylamine class, distinguished by its profound neurotoxic potential and high rate of dependency. From a C1 linguistic perspective, the term is essential for engaging in sophisticated discourse regarding pharmacology, criminal justice, and public policy. The drug's mechanism of action involves the reversal of monoamine transporters, leading to a massive efflux of dopamine into the synaptic cleft, which accounts for its intense reinforcing properties. In academic and legal literature, 'methamphetamine' is used to describe both the substance itself and the broader societal issues surrounding its manufacture and distribution. You will encounter it in complex structures, such as 'The systemic deregulation of dopamine transporters following chronic methamphetamine exposure.' The word is also central to the study of 'clandestine chemistry,' referring to the illegal synthesis of the drug in non-professional environments. Furthermore, the term is often used in the context of 'harm reduction' and 'pharmacotherapy,' where researchers discuss potential treatments for methamphetamine use disorder. At this level, you should be able to distinguish between the various isomers, such as levo-methamphetamine (used in some over-the-counter inhalers) and dextro-methamphetamine (the potent stimulant), and use the term accurately within these nuanced scientific frameworks.

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Methamphetamine represents a significant focal point in the intersection of neurobiology, forensic toxicology, and global drug policy. As a C2-level term, it is utilized within highly specialized domains to analyze the multifaceted impact of synthetic stimulants on human physiology and social structures. The pharmacokinetics of methamphetamine, characterized by its rapid absorption and long half-life, contribute to its status as a particularly insidious substance of abuse. In scholarly articles, the term is often embedded in discussions concerning the 'neurobiological correlates of addiction' or the 'epidemiological trends of synthetic drug trafficking.' For instance, one might analyze 'the role of methamphetamine in the exacerbation of socioeconomic disparities within marginalized communities.' The word also appears in the context of international law, specifically regarding the 'United Nations Convention Against Illicit Traffic in Narcotic Drugs and Psychotropic Substances.' At this level of proficiency, the speaker or writer must navigate the term's heavy connotations while maintaining an objective, analytical tone. This involves understanding the nuances of its legal classification as a Schedule II substance and the ethical implications of its rare pharmaceutical application. The term 'methamphetamine' thus serves as a gateway to discussing complex topics such as the 'neuroplasticity of the reward circuit' and the 'geopolitical ramifications of precursor chemical regulation,' requiring a high degree of precision and contextual awareness.

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开始练习例句笔记与提示

methamphetamine 30秒了解

Methamphetamine is a powerful synthetic stimulant that targets the central nervous system, leading to increased energy and euphoria but carrying a high risk of addiction.
The drug is primarily used illicitly and is known for its devastating physical and psychological effects, including severe dental issues and neurological damage over time.
In medical contexts, it is a Schedule II substance with very limited applications for ADHD and obesity, requiring strict supervision due to its potency.
Linguistically, it is a formal term often shortened to 'meth' in slang, and it appears frequently in legal, medical, and news-related discussions globally.

The term methamphetamine refers to a powerful and highly addictive stimulant that primarily affects the central nervous system. Chemically, it is a member of the substituted phenethylamine and substituted amphetamine classes. While it exists in a pharmaceutical form known as Desoxyn for treating severe attention deficit hyperactivity disorder and obesity, its most common association in contemporary society is with illicit manufacture and substance abuse. The drug works by triggering a massive release of dopamine, norepinephrine, and serotonin in the brain, leading to intense euphoria, increased alertness, and heightened physical activity. Historically, methamphetamine was synthesized from ephedrine in 1893 by Japanese chemist Nagai Nagayoshi and later crystallized in 1919 by Akira Ogata. During World War II, it was distributed to soldiers under the name Pervitin to keep them awake and focused during long missions. In modern contexts, the word is used by medical professionals, law enforcement, and social workers to describe the drug's impact on public health and safety.

Chemical Classification: Methamphetamine is a synthetic stimulant that is structurally similar to amphetamine but has more potent effects on the central nervous system due to its ability to cross the blood-brain barrier more easily.

The laboratory analysis confirmed that the seized substance was high-purity methamphetamine.

When discussing this word, it is important to distinguish between its legitimate medical use and its destructive street forms, such as crystal meth. The long-term use of the substance leads to significant neurobiological changes, including the destruction of dopamine receptors, which makes it difficult for users to experience pleasure from natural rewards. This biological reality explains the high rate of recidivism in addiction cases. In a linguistic sense, the word is often shortened to 'meth' in informal settings, but 'methamphetamine' remains the standard term in legal, scientific, and journalistic writing.

Medical Application: In the United States, the FDA has approved methamphetamine hydrochloride for the treatment of ADHD and exogenous obesity, though it is considered a second-line treatment due to its potential for abuse.

Public health campaigns often highlight the physical deterioration caused by chronic methamphetamine use.

The word is also central to discussions regarding the 'meth epidemic' that has affected various rural and urban communities globally. This context involves looking at the socioeconomic factors that drive production, such as the availability of precursor chemicals like pseudoephedrine. Sociologists use the term when analyzing the impact of drug policies and the effectiveness of rehabilitation programs.

Legal Status: Methamphetamine is classified as a Schedule II controlled substance in the United States, meaning it has a high potential for abuse but can be administered for medical purposes with severe restrictions.

Law enforcement agencies have intensified their efforts to dismantle clandestine methamphetamine laboratories.

The documentary explored the devastating effects of methamphetamine on small-town America.

Researchers are studying how methamphetamine alters the neural pathways associated with decision-making.

Understanding this word requires an appreciation of its dual nature as both a pharmaceutical tool and a societal scourge. It is a word that carries significant weight in any conversation about health, law, and social policy.

Using the word 'methamphetamine' correctly involves understanding its grammatical role as an uncountable noun and its formal register. In scientific writing, it is often the subject of sentences describing chemical reactions or biological impacts. For example, 'Methamphetamine inhibits the reuptake of dopamine,' uses the word as a specific chemical agent. In legal contexts, it frequently appears in prepositional phrases or as a direct object, such as 'The defendant was charged with possession of methamphetamine.' Because it is a long, technical word, it is rarely used in casual conversation unless the speaker is being deliberately precise or clinical.

Subject Position: Methamphetamine remains one of the most difficult addictions to treat due to its profound impact on the brain's reward system.

The prevalence of methamphetamine use has led to a rise in dental problems known as 'meth mouth'.

When describing the drug's effects, writers often use verbs like 'induce,' 'trigger,' 'deplete,' or 'stimulate.' For instance, 'Methamphetamine induces a state of hyper-arousal.' It is also common to see it paired with adjectives like 'illicit,' 'synthetic,' 'potent,' or 'crystalline.' These modifiers help clarify the specific form or legal status of the drug being discussed. In journalism, the word is often used in the context of 'methamphetamine-related crimes' or 'methamphetamine-induced psychosis,' showing how it functions as a modifier in compound nouns.

Object Position: The toxicology report indicated that the driver had ingested a significant amount of methamphetamine prior to the accident.

Community leaders are working together to reduce the supply of methamphetamine in the region.

Furthermore, the word is used in passive constructions to emphasize the substance's role in a situation: 'Methamphetamine was found hidden in the vehicle's door panels.' This usage is typical in police reports and news bulletins. In medical literature, you might find sentences like, 'The patient was prescribed methamphetamine for narcolepsy,' which highlights the rare but legitimate therapeutic use.

Prepositional Phrase: There is a growing concern about the long-term neurological damage caused by methamphetamine.

The study focused on the social consequences of methamphetamine addiction in urban environments.

The chemist explained the molecular structure of methamphetamine to the students.

Health officials are monitoring the purity levels of methamphetamine sold on the black market.

In summary, 'methamphetamine' is a versatile noun that fits into various sentence structures, provided the context remains formal and precise. Its usage is governed by the need to accurately describe a complex chemical and social phenomenon.

You are most likely to encounter the word 'methamphetamine' in serious, information-heavy environments. In the news, it appears during reports on drug busts, legislative changes, or public health crises. For example, a news anchor might say, 'Police have seized fifty kilograms of methamphetamine in a major operation.' In the world of entertainment, the word gained massive global recognition through the television series 'Breaking Bad,' where the protagonist, Walter White, produces high-grade blue methamphetamine. This show brought the technical term into the living rooms of millions, though it often used the slang 'meth' for dialogue.

Legal and Judicial Settings: In courtrooms, attorneys and judges use the full term to ensure legal precision during sentencing and testimony related to drug trafficking.

The prosecutor presented evidence of methamphetamine distribution across state lines.

Medical professionals use the word in clinical settings, especially in emergency rooms or psychiatric wards. A doctor might discuss 'methamphetamine-induced tachycardia' (a rapid heart rate) or 'methamphetamine-associated cardiomyopathy' (heart muscle disease). In these contexts, the word is a diagnostic tool. Educational settings, such as high school health classes or university pharmacology lectures, also use the term to teach students about the dangers of substance abuse and the chemistry of stimulants.

Scientific Research: Peer-reviewed journals frequently publish studies on the neurotoxicity of methamphetamine and its long-term effects on cognitive function.

The research paper detailed the effects of methamphetamine on the blood-brain barrier.

Documentaries are another common place to hear the word. Films like 'The Ice Age' or investigative pieces by National Geographic often use the term to explore the global supply chain of the drug. In these documentaries, the word is used to lend authority and factual weight to the narrative. You might also hear it in public service announcements (PSAs) aimed at preventing drug use among teenagers.

Social Work and Rehab: Counselors use the term when discussing treatment plans for individuals struggling with methamphetamine dependency.

Support groups provide a safe space for those recovering from methamphetamine addiction.

The government launched a new initiative to combat methamphetamine production.

International treaties regulate the trade of chemicals used to make methamphetamine.

Overall, 'methamphetamine' is a word that signifies gravity and technicality, appearing in contexts where the stakes are high, whether they be legal, medical, or social.

One of the most frequent mistakes people make with 'methamphetamine' is misspelling it. It is a long word with several potential pitfalls, such as forgetting the 'h' after the 't' or the 'e' at the end. Another common error is confusing it with 'amphetamine.' While they are related, methamphetamine is more potent and has a different chemical structure that allows it to enter the brain more quickly. Using the terms interchangeably in a scientific or legal context can lead to inaccuracies.

Spelling Error: Incorrect: 'methamphetamin' or 'metamphetamine'. Correct: 'methamphetamine'.

Students often confuse methamphetamine with other stimulants like MDMA.

Another mistake is using the slang term 'meth' in formal writing. While 'meth' is acceptable in casual speech or fiction dialogue, it is inappropriate for academic papers, legal documents, or professional reports. This is a matter of register. Furthermore, some people mistakenly treat the word as a countable noun, saying things like 'he took three methamphetamines.' In reality, you should say 'three doses of methamphetamine' or 'three pills containing methamphetamine.'

Misunderstanding Potency: Assuming methamphetamine and amphetamine are the same drug is a common mistake; the former is significantly more addictive and neurotoxic.

The report corrected the earlier statement that identified the substance as amphetamine instead of methamphetamine.

There is also a tendency to use the word to describe any stimulant drug. This is a generalization error. Cocaine, for example, is a stimulant but is not methamphetamine. Precision is key when discussing pharmacology. In some cases, people might mispronounce the word, skipping the middle 'a' or the 'ph' sound. The correct pronunciation is /ˌmɛθæmˈfɛtəmiːn/.

Register Mismatch: Using the slang 'meth' in a scientific journal is a register error that undermines the credibility of the research.

The journalist was careful to use the term methamphetamine to avoid sensationalism.

It is a mistake to assume that all methamphetamine is produced in large labs.

The textbook clarifies that methamphetamine is a synthetic, not a natural, substance.

By avoiding these spelling, register, and conceptual mistakes, you can use the word effectively and accurately in any professional or academic setting.

When discussing methamphetamine, several related terms often come up, each with its own specific nuance. The most direct relative is 'amphetamine,' which is the parent compound. While both are stimulants, amphetamine is more commonly prescribed for medical conditions and is generally considered less potent. Another related term is 'MDMA' (Ecstasy), which is a substituted methamphetamine with empathogenic and hallucinogenic properties. While MDMA shares a chemical backbone with methamphetamine, its effects and social context are quite different.

Methamphetamine vs. Amphetamine: Methamphetamine has an extra methyl group, making it more fat-soluble and allowing it to penetrate the brain more effectively than amphetamine.

While both are stimulants, methamphetamine is associated with much higher levels of neurotoxicity.

In informal contexts, you will hear synonyms like 'speed,' 'ice,' 'crystal,' 'crank,' or 'glass.' These terms usually refer to the physical form of the drug or the way it is consumed. 'Ice' and 'crystal' specifically refer to the high-purity, crystalline form of methamphetamine hydrochloride. In a medical context, 'Desoxyn' is the brand name for pharmaceutical methamphetamine. When writing about the drug's effects, you might use broader terms like 'central nervous system stimulant' or 'psychostimulant.'

Methamphetamine vs. Cocaine: Cocaine is a natural alkaloid from the coca plant, whereas methamphetamine is entirely synthetic and has a much longer duration of action.

The half-life of methamphetamine is significantly longer than that of cocaine, leading to prolonged effects.

Another alternative term is 'methylamphetamine,' which is synonymous with methamphetamine and is sometimes used in British English or older scientific texts. When discussing the social impact, you might use terms like 'illicit substance' or 'controlled substance.' These provide a more formal or legalistic tone. In the context of addiction, 'methamphetamine use disorder' is the clinical term used in the DSM-5.

Methamphetamine vs. Ephedrine: Ephedrine is a precursor used in the synthesis of methamphetamine; it is often found in over-the-counter cold medicines.

The regulation of ephedrine sales has been a key strategy in reducing methamphetamine production.

The effects of methamphetamine are often compared to those of other potent stimulants.

Researchers use methamphetamine in animal models to study the neurobiology of addiction.

Choosing the right word depends on whether you are speaking to a chemist, a police officer, a doctor, or a general audience. Each synonym and alternative carries a different level of technicality and social connotation.

How Formal Is It?

趣味小知识

Methamphetamine was originally marketed as a nasal decongestant and a treatment for various ailments before its addictive potential was fully realized. In the 1930s, it was sold over the counter in many countries. It was even included in the chocolate rations of some soldiers during World War II to improve their performance and morale.

发音指南

UK /ˌmɛθæmˈfɛtəmiːn/

US /ˌmɛθæmˈfɛtəˌmin/

meth-am-PHET-a-mine

押韵词

amphetamine dopamine serotonin histamine vitamin examine determine famine

常见错误

Pronouncing it as 'met-amphetamine' (missing the 'h').
Saying 'meth-am-phet-a-mean' with too much emphasis on the last syllable.
Skipping the 'am' and saying 'meth-phetamine'.
Confusing the 'ph' with a 'p' sound.
Mumbling the middle 'a' so it sounds like 'meth-am-phet-mine'.

难度评级

阅读 7/5

The word is long and technical, but its frequent appearance in news makes it recognizable for intermediate learners.

写作 8/5

Spelling is the main challenge, along with maintaining the correct formal register.

口语 7/5

The multi-syllabic nature requires practice to pronounce fluently without stumbling.

听力 6/5

It is usually pronounced clearly in formal contexts, making it easier to identify.

接下来学什么

前置知识

drug chemical brain dangerous illegal

接下来学习

neurotoxicity stimulant pharmacology addiction rehabilitation

高级

sympathomimetic dopaminergic norepinephrine clandestine epidemiology

需要掌握的语法

Uncountable Nouns

We need more information about methamphetamine (Not: methamphetamines).

Compound Adjectives

A methamphetamine-related incident occurred last night.

Passive Voice in Formal Reports

Methamphetamine was detected in the sample.

Prepositional Phrases

The fight against methamphetamine is ongoing.

Gerunds as Subjects

Manufacturing methamphetamine is a serious crime.

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按水平分级的例句

Methamphetamine is a very dangerous drug.

Subject + Verb + Adjective + Noun.

The police found methamphetamine in the car.

Uncountable noun used as a direct object.

Methamphetamine makes people very sick.

Simple present tense for a general fact.

It is illegal to have methamphetamine.

It is + adjective + to-infinitive.

Methamphetamine is a chemical made in a lab.

Passive participle 'made' modifying 'chemical'.

Do not use methamphetamine.

Imperative sentence for a command.

The news talked about methamphetamine today.

Prepositional phrase 'about methamphetamine'.

Methamphetamine is bad for your brain.

Adjective phrase 'bad for your brain'.

Methamphetamine is a synthetic drug that affects the brain.

Relative clause 'that affects the brain'.

Many people are addicted to methamphetamine.

Adjective 'addicted' followed by the preposition 'to'.

The doctor explained why methamphetamine is harmful.

Indirect question 'why methamphetamine is harmful'.

Using methamphetamine can cause serious heart problems.

Gerund 'Using' as the subject of the sentence.

The government wants to stop methamphetamine production.

Compound noun 'methamphetamine production'.

Methamphetamine is more powerful than regular amphetamine.

Comparative adjective 'more powerful than'.

He was arrested for selling methamphetamine.

Preposition 'for' followed by a gerund.

Methamphetamine stays in the body for a long time.

Present simple for a scientific fact.

The long-term use of methamphetamine can lead to permanent brain damage.

Modal verb 'can' expressing possibility.

Methamphetamine is often produced in clandestine laboratories.

Passive voice 'is often produced'.

The patient showed symptoms of methamphetamine withdrawal.

Noun phrase 'methamphetamine withdrawal'.

Researchers are studying the effects of methamphetamine on social behavior.

Present continuous tense for ongoing research.

Methamphetamine abuse is a significant issue in many rural communities.

Uncountable noun as part of a subject phrase.

The law prohibits the manufacture and distribution of methamphetamine.

Formal verb 'prohibits' with multiple objects.

Methamphetamine increases the levels of dopamine in the brain's reward system.

Possessive 'brain's' modifying 'reward system'.

It is difficult to treat someone with a methamphetamine addiction.

Adjective 'difficult' followed by an infinitive.

Methamphetamine-induced psychosis can manifest as vivid hallucinations and paranoia.

Compound adjective 'Methamphetamine-induced'.

The illicit trade of methamphetamine has become a global security concern.

Present perfect tense 'has become'.

Methamphetamine is classified as a Schedule II drug due to its high potential for abuse.

Prepositional phrase 'due to' expressing cause.

Chronic methamphetamine exposure leads to the depletion of essential neurotransmitters.

Subject-verb agreement with 'exposure' (singular).

Public health initiatives aim to educate the youth about the dangers of methamphetamine.

Infinitive of purpose 'to educate'.

The purity of street-level methamphetamine varies significantly between regions.

Adverb 'significantly' modifying the verb 'varies'.

Methamphetamine acts as a potent agonist for the trace amine-associated receptor 1.

Technical scientific terminology.

The documentary explores the socioeconomic factors driving methamphetamine use.

Present participle 'driving' as an adjective.

The neurotoxicity of methamphetamine is characterized by the destruction of dopaminergic terminals.

Passive construction 'is characterized by'.

Methamphetamine's high lipid solubility allows it to penetrate the central nervous system rapidly.

Possessive 'Methamphetamine's' modifying 'solubility'.

The legislative response to the methamphetamine epidemic has sparked intense debate.

Complex subject phrase.

Clandestine methamphetamine synthesis often involves hazardous precursor chemicals.

Adjective 'clandestine' modifying 'synthesis'.

Methamphetamine use disorder is a complex condition requiring multi-faceted treatment.

Present participle phrase 'requiring multi-faceted treatment'.

The pharmacokinetic profile of methamphetamine explains its long duration of action.

Scientific noun phrase 'pharmacokinetic profile'.

Methamphetamine-related fatalities have seen a sharp increase over the last decade.

Compound adjective 'Methamphetamine-related'.

Cognitive behavioral therapy has shown promise in treating methamphetamine dependency.

Present perfect 'has shown' with a gerund object.

The structural modifications of methamphetamine enhance its potency relative to its parent compound.

Abstract noun 'modifications' as the subject.

Methamphetamine's role in the exacerbation of cardiovascular pathologies is well-documented.

Nominalization 'exacerbation' and 'pathologies'.

The pervasive nature of methamphetamine trafficking necessitates international cooperation.

Formal verb 'necessitates'.

Methamphetamine-induced oxidative stress is a primary mechanism of neuronal damage.

Technical scientific subject.

The decriminalization of methamphetamine remains a contentious issue in public health circles.

Gerund 'decriminalization' as part of a complex subject.

Methamphetamine acts as a substrate for the vesicular monoamine transporter 2.

Precise biochemical terminology.

The longitudinal study assessed the impact of methamphetamine on executive function.

Adjective 'longitudinal' describing the study.

Methamphetamine synthesis via the Nagai method utilizes red phosphorus and iodine.

Prepositional phrase 'via the Nagai method'.

近义词

crystal meth speed ice psychostimulant Desoxyn crank glass methylamphetamine

反义词

depressant sedative tranquilizer hypnotic

常见搭配

methamphetamine abuse

methamphetamine addiction

methamphetamine production

methamphetamine laboratory

methamphetamine-induced psychosis

methamphetamine use disorder

methamphetamine trafficking

methamphetamine precursors

chronic methamphetamine use

methamphetamine seizure

常用短语

methamphetamine epidemic

— A widespread occurrence of methamphetamine use and its related social problems. It is used to describe a public health crisis.

The city is struggling to cope with the methamphetamine epidemic.

methamphetamine-related crime

— Criminal activities that are directly or indirectly caused by the use or sale of the drug. This includes theft and violence.

There has been a surge in methamphetamine-related crime in the area.

clandestine methamphetamine lab

— A secret and illegal facility used to manufacture the drug. These are often dangerous and explosive.

The police raided a clandestine methamphetamine lab in the woods.

methamphetamine withdrawal symptoms

— The physical and mental effects experienced when a person stops using the drug. These can be very severe.

He experienced intense methamphetamine withdrawal symptoms for weeks.

methamphetamine hydrochloride

— The chemical name for the salt form of the drug, which is usually the form that is consumed. It is a very technical term.

The report identified the white powder as methamphetamine hydrochloride.

methamphetamine dependency

— A state where a person's body and mind rely on the drug to function. It is a formal way to say addiction.

The program helps individuals overcome methamphetamine dependency.

methamphetamine overdose

— A dangerous and potentially fatal situation caused by taking too much of the drug. It requires immediate medical attention.

The emergency room treated three cases of methamphetamine overdose last night.

methamphetamine-associated heart disease

— Heart problems that are caused by the long-term use of the stimulant. It is a specific medical diagnosis.

The patient was diagnosed with methamphetamine-associated heart disease.

methamphetamine task force

— A specialized group of law enforcement officers dedicated to stopping the drug trade. They focus on production and sales.

The regional methamphetamine task force made several arrests this week.

methamphetamine-induced brain damage

— Permanent changes to the brain's structure and function caused by the drug's neurotoxicity. It is a serious health concern.

Studies show clear evidence of methamphetamine-induced brain damage in long-term users.

容易混淆的词

methamphetamine vs amphetamine

Methamphetamine is a more potent and addictive derivative of amphetamine.

methamphetamine vs MDMA

While related, MDMA has hallucinogenic effects that methamphetamine lacks.

methamphetamine vs methylphenidate

This is Ritalin, a different stimulant used for ADHD, often confused due to the 'methyl' prefix.

习语与表达

"tweak out"

— To behave in a frantic, paranoid, or erratic way due to being under the influence of methamphetamine. It is a very informal slang term.

He started to tweak out after staying awake for three days.

slang

"on the glass"

— A slang expression meaning to be using or smoking methamphetamine. It refers to the glass pipes often used.

The neighbors suspected he was back on the glass.

slang

"meth mouth"

— A non-medical but widely used term to describe the severe tooth decay and gum disease common in methamphetamine users.

The dentist noticed signs of meth mouth during the examination.

informal

"cranked up"

— To be highly stimulated or hyperactive, often implying the use of methamphetamine or similar stimulants. It can also mean to increase the volume of something.

He was all cranked up and couldn't sit still.

slang

"shadow people"

— A common hallucination reported by methamphetamine users during periods of sleep deprivation, where they see dark figures in their peripheral vision.

After four days without sleep, he started seeing shadow people.

slang

"cooking meth"

— The process of illegally manufacturing methamphetamine in a laboratory. It has become a common cultural phrase.

The police caught them cooking meth in a remote cabin.

informal

"wired to the moon"

— An idiom meaning to be extremely high on a stimulant or very energetic, sometimes used in the context of methamphetamine use.

He came into the office looking wired to the moon.

informal

"speed freak"

— A derogatory term for someone who is addicted to amphetamines or methamphetamine. It is an older slang term.

The movie portrayed the life of a speed freak in the 1970s.

slang

"spun out"

— To be in a state of confusion or disorientation caused by heavy methamphetamine use. It implies a loss of control.

She was completely spun out and didn't know where she was.

slang

"ice queen"

— A slang term sometimes used for a female methamphetamine dealer or a woman who is a heavy user of 'ice'.

The local police were tracking the so-called ice queen of the neighborhood.

slang

容易混淆

methamphetamine vs Amphetamine

They sound similar and belong to the same class of drugs.

Methamphetamine has an extra methyl group, making it more fat-soluble and thus more potent and faster-acting in the brain.

Adderall contains amphetamine, but it is not the same as methamphetamine.

methamphetamine vs Methylphenidate

Both are stimulants used to treat ADHD and start with 'meth'.

Methylphenidate (Ritalin) has a different chemical structure and is generally considered less prone to abuse than methamphetamine.

The doctor prescribed methylphenidate instead of methamphetamine.

methamphetamine vs Ephedrine

Ephedrine is used to make methamphetamine.

Ephedrine is a legal decongestant, whereas methamphetamine is a highly regulated or illegal stimulant.

The pharmacy tracks sales of ephedrine to prevent methamphetamine production.

methamphetamine vs Mephedrone

They are both synthetic stimulants with similar-sounding names.

Mephedrone is a cathinone, often called 'bath salts', and is chemically distinct from methamphetamine.

The toxicology report distinguished between mephedrone and methamphetamine.

methamphetamine vs Methadone

Both start with 'meth' and are related to drug addiction.

Methadone is an opioid used to treat heroin addiction, while methamphetamine is a stimulant. They have opposite effects.

He is on a methadone program, but he used to struggle with methamphetamine.

句型

Methamphetamine is [adjective].

Methamphetamine is bad.

People use methamphetamine to [verb].

People use methamphetamine to stay awake.

The use of methamphetamine leads to [noun].

The use of methamphetamine leads to addiction.

Methamphetamine is known for [gerund phrase].

Methamphetamine is known for causing brain damage.

The neurotoxicity of methamphetamine is [adjective phrase].

The neurotoxicity of methamphetamine is a major concern.

Methamphetamine acts as a [noun] in the [noun].

Methamphetamine acts as a stimulant in the central nervous system.

Despite its [noun], methamphetamine is [adjective].

Despite its medical use, methamphetamine is dangerous.

Given the [noun], methamphetamine remains [adjective].

Given the high addiction rate, methamphetamine remains illegal.

词族

名词

methamphetamine

amphetamine

methylamphetamine

形容词

methamphetamine-induced

methamphetamine-related

如何使用

frequency

Common in news, medical, and legal contexts; rare in everyday polite conversation.

常见错误

Spelling it as 'metamphetamine'. → methamphetamine
Many people forget the 'h' after the 't'. The word comes from 'methyl', which always has an 'h'.
Using 'meth' in a university essay. → methamphetamine
Slang is generally not acceptable in academic writing. Using the full chemical name shows a higher level of vocabulary and professionalism.
Confusing it with 'methadone'. → methamphetamine
Methadone is used to treat heroin addiction, while methamphetamine is a stimulant. They are very different drugs with opposite effects.
Saying 'he took many methamphetamines'. → he took a lot of methamphetamine
Methamphetamine is an uncountable noun. You should use 'amount' or 'doses' if you want to count it.
Pronouncing the 'ph' as a 'p'. → /f/
The 'ph' in methamphetamine is always pronounced as an 'f' sound, just like in 'phone' or 'pharmacy'.

小贴士

Mastering the Length

To remember the spelling, break it into chunks: METH-AM-PHET-A-MINE. Remember that 'phetamine' is the same ending as 'amphetamine'. The 'ph' makes an 'f' sound, which is a common trap for learners.

When to Use the Full Word

Always use the full word 'methamphetamine' in any writing that will be graded or reviewed professionally. Slang terms like 'meth' or 'ice' can make your writing seem biased or unscientific. Save the slang for fictional dialogue.

Uncountable Usage

Treat 'methamphetamine' like 'water' or 'sugar'. You don't usually say 'a methamphetamine'. Instead, use phrases like 'a gram of methamphetamine' or 'the presence of methamphetamine' to be grammatically correct.

Distinguish from Amphetamine

Be careful not to use 'amphetamine' when you mean 'methamphetamine'. In a legal or medical context, this is a major error. Methamphetamine is the more potent 'cousin' of amphetamine, and the distinction is vital.

Stress the 'PHET'

Native speakers put the most emphasis on the third syllable: meth-am-PHET-a-mine. If you stress the first or last syllable too much, it may sound unnatural. Practice saying it rhythmically to get it right.

Global Awareness

Be aware that this word has different connotations in different countries. In some places, it's a 'poverty drug', while in others, it's linked to the party scene. Understanding the local context will help you use the word more sensitively.

Identify the Suffix

The suffix '-amine' is common in many chemical names. When you hear it, you can immediately identify the word as a chemical or drug. This helps you categorize the information even if you don't know the specific compound.

Use as a Modifier

You can use 'methamphetamine' to modify other nouns, like 'methamphetamine addiction' or 'methamphetamine policy'. This is a very common and efficient way to use the word in formal reports.

Clinical Tone

When discussing drugs, maintaining a clinical tone helps avoid sensationalism. Use 'methamphetamine' rather than 'the deadly drug' to stay objective and focus on the facts of the situation.

The 'Methyl' Connection

If you know basic chemistry, remember that 'meth-' comes from 'methyl'. This helps you remember the first four letters of the word and links it to its chemical structure.

记住它

记忆技巧

Think of 'METH' (the drug) + 'AM' (I am) + 'PHET' (fast like a jet) + 'A' + 'MINE' (it's mine/dangerous). METH-AM-PHET-A-MINE.

视觉联想

Imagine a blue crystal (like in Breaking Bad) next to a human brain that is glowing too brightly, showing over-stimulation.

Word Web

Stimulant Dopamine Addiction Crystal Laboratory Illegal Neurotoxic Desoxyn

挑战

Try to write a paragraph about the history of medicine without using the slang 'meth', only using the full word 'methamphetamine' three times correctly.

词源

The word is a portmanteau of its chemical components: 'methyl', 'alpha', 'methyl', 'phenyl', 'ethyl', and 'amine'. It was first coined in the late 19th century as chemists began synthesizing these compounds. The 'meth-' prefix indicates the presence of a methyl group, which distinguishes it from regular amphetamine. It was formally named in scientific literature as its properties became better understood by researchers in Japan and Germany.

原始含义： A specific chemical compound: 1-phenyl-2-methylaminopropane.

Scientific Latin/Greek roots (Chemical nomenclature).

文化背景

This is a highly sensitive topic. When using the word, be aware of the stigma associated with addiction and avoid using derogatory slang when referring to people who use the drug.

In the US and Australia, the word is often linked to the 'rural meth crisis' and is a frequent topic in local politics and health initiatives.

Breaking Bad (TV Series) Beautiful Boy (Book and Movie) The Man in the High Castle (Novel - mentions Pervitin)

在生活中练习

真实语境

Medical Diagnosis

methamphetamine-induced psychosis
methamphetamine use disorder
history of methamphetamine abuse
methamphetamine toxicology screen

Law Enforcement

possession of methamphetamine
methamphetamine trafficking
clandestine methamphetamine lab
methamphetamine seizure

Public Health

methamphetamine epidemic
methamphetamine prevention program
dangers of methamphetamine
methamphetamine recovery

Scientific Research

methamphetamine neurotoxicity
methamphetamine administration
effects of methamphetamine
methamphetamine pharmacology

News Reporting

methamphetamine-related arrest
methamphetamine bust
rise in methamphetamine use
methamphetamine crisis

对话开场白

"Have you ever seen a documentary about the impact of methamphetamine on local communities?"

"What do you think is the most effective way to address the methamphetamine epidemic?"

"Did you know that methamphetamine was actually used by soldiers during World War II?"

"How does the portrayal of methamphetamine in shows like Breaking Bad affect public perception?"

"Why do you think methamphetamine is considered more dangerous than other stimulants?"

日记主题

Reflect on how drug addiction, specifically to substances like methamphetamine, affects the social fabric of a city.

Write about the ethical implications of using powerful stimulants like methamphetamine for medical purposes.

Discuss the role of the media in educating the public about the dangers of methamphetamine.

How should governments balance law enforcement and healthcare when dealing with methamphetamine use?

Imagine a world where synthetic drugs like methamphetamine did not exist. How would society be different?

常见问题

10 个问题

There is no chemical difference; 'meth' is simply the common slang or shortened version of the full word 'methamphetamine'. In formal, medical, or legal contexts, the full word is always preferred. Using 'meth' in a scientific paper would be considered unprofessional. However, in casual speech, 'meth' is the most frequent term used.

Yes, methamphetamine is legally available by prescription in the United States under the brand name Desoxyn. It is used to treat severe ADHD and occasionally for short-term weight loss in cases of extreme obesity. However, it is a Schedule II drug, meaning it is strictly controlled and rarely prescribed because of its high potential for addiction and abuse. Most people only encounter the illegal, street-made version.

Methamphetamine is addictive because it causes the brain to release an enormous amount of dopamine, the chemical associated with pleasure and reward. This surge is much higher than what is produced by natural activities like eating or exercise. Over time, the brain becomes dependent on the drug to feel any pleasure at all, and the user requires more of the drug to achieve the same effect, leading to a powerful cycle of addiction.

Long-term use of methamphetamine can lead to devastating health problems. These include permanent damage to the brain's blood vessels, heart disease, and severe dental problems known as 'meth mouth'. Psychologically, it can cause chronic paranoia, hallucinations, and anxiety. Many of these changes to the brain's structure and function can last for years even after the person stops using the drug.

Illicit methamphetamine is typically produced in clandestine laboratories using a variety of chemicals. Common precursors include ephedrine or pseudoephedrine, which are found in some cold medicines. The process involves hazardous substances like anhydrous ammonia, red phosphorus, and lithium. Because these chemicals are volatile, 'meth labs' are often the site of dangerous fires and explosions.

Methamphetamine can come in several forms. The most common street form is a white, bitter-tasting powder or a pill. 'Crystal meth' looks like clear, chunky crystals or shiny blue-white rocks, resembling ice or glass. It can also be found in a liquid form. The appearance often depends on the purity of the drug and how it was manufactured.

Yes, although it is very challenging, methamphetamine addiction can be treated. The most effective treatments currently are behavioral therapies, such as cognitive-behavioral therapy (CBT) and contingency management. These help patients change their thinking patterns and provide incentives for staying drug-free. There are currently no FDA-approved medications specifically for treating methamphetamine addiction, but research is ongoing.

This is a mental health condition caused by the use of methamphetamine. Symptoms include extreme paranoia, delusions, and hallucinations (such as feeling like bugs are crawling under the skin). It often resembles schizophrenia. While it usually goes away after the drug leaves the body, in some chronic users, the psychotic symptoms can persist for weeks, months, or even become permanent.

No, they are different drugs, although both are stimulants. Cocaine is derived from the coca plant and has a short duration of action, usually lasting about 20 to 30 minutes. Methamphetamine is completely synthetic and lasts much longer, with effects continuing for 8 to 24 hours. Methamphetamine is also generally considered more neurotoxic, meaning it causes more direct damage to brain cells.

Law enforcement uses several methods to detect methamphetamine. These include field test kits that change color when they touch the drug, specially trained drug-sniffing dogs, and laboratory analysis using gas chromatography or mass spectrometry. In individuals, it can be detected through urine, blood, hair, or saliva tests, which look for the drug or its metabolites.

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