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A2 verb #7,000 most common 11 min read

esterilizar

Top 7,000

Practice it Examples Notes & Tips esterilizar in 30 Seconds

Explanation esterilizar in your Level:

At the A1 level, you should recognize 'esterilizar' as a word for 'super cleaning'. Think of it like washing dishes but much stronger. You might see this word on baby products or at a doctor's office. It is a regular '-ar' verb, so it follows the same pattern as 'falar' or 'trabalhar'. For now, focus on the basic meaning: making something free of germs. You can use it in simple sentences like 'Eu esterilizo a mamadeira' (I sterilize the baby bottle). Don't worry about the complex scientific details yet; just remember it is about safety and health. It is a 'cognate', which means it looks like the English word 'sterilize', making it easy to remember. Just remember to spell it with a 'z' in Portuguese. At this stage, you only need to know how to use it in the present tense to describe a routine or a simple necessity. You might hear a teacher or a parent use it as an instruction. It is a very useful word if you are traveling and need to ask about the safety of water or medical tools. Even if you don't use it often, being able to recognize it will help you understand safety signs and labels on hygiene products.

At the A2 level, you are expected to use 'esterilizar' in more varied contexts, such as describing past actions or future plans. You should understand that this verb is transitive, meaning it needs an object. For example, 'Ontem, eu esterilizei os frascos de vidro' (Yesterday, I sterilized the glass jars). You should also begin to distinguish it from 'limpar' (to clean). At this level, you might encounter it in health-related conversations or when talking about pets. For instance, 'Vou esterilizar minha gata' (I am going to spay my cat). Understanding the difference between 'esterilizar' and 'desinfetar' starts to become important here. You will also see it in the imperative form in instructions, like 'Esterilize antes de usar' (Sterilize before using). You should be comfortable with its regular conjugation in the 'Pretérito Perfeito' (Simple Past) and 'Futuro do Presente' (Simple Future). This word is common in household chores involving babies or food preservation. If you are learning Portuguese for work in a salon or a kitchen, this word is essential. You should also recognize the noun form 'esterilização' (sterilization) and the adjective 'esterilizado' (sterilized).

At the B1 level, you should be able to discuss the importance of sterilization in society and health. You can use 'esterilizar' in complex sentences with conjunctions like 'porque', 'embora', or 'para que'. For example, 'É necessário esterilizar os instrumentos para que não haja infecção' (It is necessary to sterilize the instruments so that there is no infection). You should also be familiar with the passive voice: 'Os materiais foram esterilizados pela equipe' (The materials were sterilized by the team). At this stage, you can participate in discussions about animal rights and population control using this word. You should understand the nuances of the word in different professional fields, such as dentistry or food science. Your vocabulary should also include related terms like 'autoclave' or 'agentes químicos'. You should be able to explain the process in your own words, perhaps describing how heat or chemicals are used. In writing, you should be able to compose a short set of instructions for a process that requires sterilization. You will also start to notice the word in news reports about public health or veterinary campaigns. Your pronunciation should be clear, paying attention to the final 'r' and the nasal 'en' if you use the noun 'esterilização'.

At the B2 level, you should have a firm grasp of 'esterilizar' in both literal and more technical contexts. You can use it fluently in debates about medical ethics or public health policies. You should understand the difference between 'esterilização' as a process of cleaning and 'esterilização' as a surgical procedure for birth control. You are expected to use the subjunctive mood correctly with this verb: 'Duvido que eles tenham esterilizado tudo corretamente' (I doubt they have sterilized everything correctly). You should also be able to use it in the conditional: 'Se tivéssemos esterilizado o solo, as plantas teriam crescido melhor' (If we had sterilized the soil, the plants would have grown better). At this level, you can read technical manuals or scientific articles that use the word. You should also be aware of the register; 'esterilizar' is a formal, precise word, whereas in casual speech, people might use 'ferver' or 'limpar bem'. You can discuss the history of sterilization or its role in the industrial revolution. Your ability to use synonyms like 'higienizar' or 'sanitizar' (a loanword often used in industry) appropriately in different contexts is a sign of your advanced level.

At the C1 level, you should use 'esterilizar' with the precision of a native speaker, understanding its metaphorical potential as well as its technical rigour. You can discuss the socioeconomic implications of mass sterilization programs or the chemistry behind different sterilization methods. You should be able to handle the word in highly formal writing, such as legal documents or medical reports, ensuring perfect agreement and advanced syntax. For instance, using the personal infinitive in complex structures: 'O fato de esterilizarem os equipamentos sem supervisão causou preocupação' (The fact that they sterilized the equipment without supervision caused concern). You should also recognize and use the word in abstract contexts, such as 'esterilizar um debate' (to make a debate sterile/unproductive), though this is more metaphorical. You can analyze the etymology of the word and its evolution in the Portuguese language. Your listening skills should allow you to understand fast-paced technical discussions or lectures where the word is used. You should also be able to explain the subtle differences between 'esterilização', 'desinfecção', and 'antissepsia' in a professional or academic environment. Your command of the word family, including 'esterilizador', 'esterilizável', and 'esterilidade', should be complete.

At the C2 level, 'esterilizar' is a word you use with absolute ease and stylistic flexibility. You can use it in creative writing, academic research, or high-level professional negotiation. You understand the most obscure technical uses, such as in aerospace engineering (sterilizing spacecraft) or advanced microbiology. You can navigate the ethical complexities of the word when it refers to human reproductive rights in a historical or legal context. Your use of the verb will be grammatically flawless, including the most complex uses of the subjunctive, conditional, and passive voice. You can appreciate the word's nuances in different Lusophone countries, noting if there are any subtle regional preferences in terminology. You are capable of translating complex technical texts containing this word from English to Portuguese, maintaining the exact level of formality and technicality. You might use the word in a philosophical sense to describe the removal of vital elements from a piece of art or a culture, demonstrating a deep grasp of the language's expressive power. At this level, the word is no longer just a vocabulary item; it is a precise tool in your extensive linguistic repertoire, used to convey exact meanings in the most sophisticated contexts.

Practice it Examples Notes & Tips

esterilizar in 30 Seconds

Esterilizar is a Portuguese verb meaning to completely eliminate bacteria, viruses, and other microorganisms using heat, chemicals, or radiation for safety.
It is also the standard term for the surgical process of making an animal or human incapable of reproduction, often called spaying or neutering.
A regular -ar verb, it is easy to conjugate but always spelled with a 'z', distinguishing it from the English 'sterilise' which can use an 's'.
Commonly used in medical, veterinary, culinary (food preservation), and childcare contexts to describe a high level of hygiene and decontamination.

The Portuguese verb esterilizar is a fundamental term that English speakers will recognize due to its Latin roots, but its application in Lusophone cultures carries specific nuances that are essential for mastery. At its core, to esterilizar means to eliminate all forms of life, particularly microorganisms like bacteria, viruses, and fungi, from a surface, liquid, or instrument. This is not merely 'cleaning' (limpar) or 'disinfecting' (desinfetar); it represents a higher standard of decontamination often achieved through extreme heat, chemicals, or radiation. In a medical or laboratory setting, this word is non-negotiable. If a surgeon asks for a tool, they need to know it has been through the process to esterilizar. However, the word extends far beyond the hospital walls. In the domestic sphere, parents often talk about the need to esterilizar as mamadeiras (sterilize baby bottles) to protect infants with developing immune systems. Furthermore, in the context of food preservation, anyone making homemade 'geleia' (jam) or 'conservas' (preserves) must esterilizar the glass jars to prevent spoilage. There is also a biological and veterinary dimension: esterilizar is the technical term for making a living being incapable of reproduction. While 'castrar' is commonly used for male animals, 'esterilizar' is frequently used for females or as a general term for population control programs. Understanding when to use this word versus its lighter counterparts is a key marker of your Portuguese proficiency.

Technical Accuracy: Esterilizar refers to the absolute destruction of microbes, whereas desinfetar only reduces their number.

Veterinary Usage: In Portugal and Brazil, campaigns for 'esterilização animal' are common to control stray populations.

Domestic Safety: It is common to hear 'esterilizar a água' in areas where tap water might not be potable, usually by boiling it.

O médico explicou que precisamos esterilizar todo o equipamento antes da operação começar para evitar qualquer tipo de infecção hospitalar perigosa.

Depois de lavar os frascos de vidro, você deve esterilizar cada um deles em água fervente por pelo menos dez minutos.

A prefeitura lançou uma campanha gratuita para esterilizar cães e gatos de rua este mês.

É fundamental esterilizar a agulha antes de tentar remover um espinho da pele.

Laboratórios de pesquisa usam autoclaves modernas para esterilizar materiais de cultura sensíveis.

Using esterilizar correctly involves understanding its conjugation as a regular '-ar' verb and its syntactic relationship with direct objects. Because it is a transitive verb, it almost always requires an object—the thing being sterilized. For example, 'Eu esterilizei o alicate' (I sterilized the pliers). In terms of tense, you will often find it in the imperative when giving instructions, such as 'Esterilize os instrumentos agora!' (Sterilize the instruments now!). In more complex sentences, it often appears in the infinitive after auxiliary verbs: 'Nós precisamos esterilizar os potes' (We need to sterilize the jars). One interesting aspect of Portuguese is the use of the personal infinitive, which might occur in a sentence like 'É importante esterilizarmos tudo' (It is important that we sterilize everything). When discussing the veterinary aspect, the verb can be used in the passive voice: 'A gata foi esterilizada ontem' (The cat was sterilized yesterday). It is also worth noting the word order; while Portuguese is flexible, the standard Subject-Verb-Object pattern is the most common for this verb. You should also pay attention to the nouns that typically follow this verb, known as collocations. Common objects include 'objetos', 'materiais', 'ambientes', and 'seres vivos' (in a biological context). If you are talking about a room, you might use 'esterilizar o ambiente' to imply a deep, medical-grade cleaning. In laboratory reports, you will see the past participle used as an adjective: 'material esterilizado' (sterilized material). This distinction is vital: 'esterilizar' is the action, while 'esterilizado' is the state of the object after the action is complete.

Direct Object Requirement: Always specify what is being sterilized; the verb rarely stands alone without context.

Instructional Use: In manuals and recipes, the imperative 'esterilize' is the standard way to direct the reader.

Passive Voice: Common in medical and veterinary contexts: 'Os bisturis foram esterilizados'.

Você já esterilizou as mamadeiras do bebê para a viagem de amanhã?

Eles pretendem esterilizar todos os equipamentos do laboratório no final do expediente.

Para fazer a conserva perfeita, é essencial esterilizar os vidros com cuidado.

A enfermeira começou a esterilizar a área ao redor da ferida antes de aplicar os pontos.

Se não esterilizarmos o solo, as pragas podem destruir a plantação inteira rapidamente.

In daily life in a Portuguese-speaking country, you will encounter esterilizar in several distinct environments. The most common is the healthcare system. Whether you are at a 'posto de saúde' (health center) in Brazil or a 'centro de saúde' in Portugal, you will see signs about the 'sala de esterilização' (sterilization room). Nurses and technicians use the word constantly when discussing protocol. Another major area is the beauty and personal care industry. If you go to a 'manicure' or 'pedicure', it is standard practice (and often a legal requirement) for them to esterilizar os alicates (sterilize the nippers) in an autoclave to prevent the spread of diseases like hepatitis. You might ask, 'Você esterilizou estes instrumentos?' to ensure your safety. In the media, especially during public health campaigns, the word appears frequently. During the COVID-19 pandemic, although 'desinfetar' was more common for surfaces, 'esterilizar' was used when discussing PPE (Personal Protective Equipment) for doctors. In the veterinary world, you will see posters in pet shops or clinics promoting 'campanhas de esterilização', which are often subsidized or free programs to neuter pets. At home, the word is part of the vocabulary of new parents. Walk into any 'loja de bebês' (baby store), and you will find 'esterilizadores de mamadeira' (baby bottle sterilizers). Finally, in the culinary world, particularly among artisanal producers of 'geleias' and 'compotas' (jams and compotes), the process to esterilizar is a hot topic of discussion in workshops and YouTube tutorials. It is a word that bridges the gap between high-level science and everyday hygiene, making it a versatile addition to your vocabulary.

Beauty Salons: Crucial for safety; always look for the 'esterilizado' seal on tool pouches.

Public Health: Used in government announcements regarding vaccination and surgical safety.

Baby Care: A constant concern for hygiene-conscious parents using steam or boiling water.

A manicure garantiu que costuma esterilizar todos os seus utensílios metálicos após cada cliente.

No hospital, existe uma equipe dedicada exclusivamente a esterilizar o material cirúrgico pesado.

Muitas ONGs trabalham para esterilizar animais abandonados e reduzir o sofrimento nas ruas.

Você precisa esterilizar a chupeta se ela cair no chão da rua.

O protocolo exige esterilizar as superfícies de trabalho com álcool setenta por cento.

One of the most frequent mistakes learners make with esterilizar is confusing it with 'limpar' (to clean) or 'lavar' (to wash). While cleaning removes visible dirt, the action to esterilizar is a microscopic process. Saying 'Eu vou esterilizar a mesa' when you just mean wiping it with a cloth is an overstatement unless you are using specific medical-grade techniques. Another common error is the spelling. English speakers might be tempted to use an 's' (esterilisar) because of the English 'sterilise' (UK spelling), but in Portuguese, the only correct spelling is with a 'z'. Additionally, learners often struggle with the prepositional usage. You esterilizar *something*, not *to* something. It is a direct transitive verb. In the context of animals, a common mistake is using 'esterilizar' only for females and 'castrar' only for males. While this is a common colloquial distinction, technically, 'esterilizar' can apply to both, and 'castrar' specifically refers to the removal of gonads. Using them interchangeably is usually fine in casual talk, but in a veterinary exam, precision matters. Pronunciation is another pitfall; the 'r' at the end of 'esterilizar' should be soft or aspirated depending on the regional accent (like the 'h' in 'hat' in many Brazilian accents or a tapped 'r' in Portugal), but it should never be silent. Finally, avoid the mistake of using the word in a social context to mean 'excluding' or 'isolating' people; while 'esterilizar' can metaphorically mean making something barren or unproductive, it is rarely used for people in a social sense unlike the English 'sterilize' which sometimes appears in political or social critiques.

Spelling Trap: Always use 'z'. 'Esterilisar' with an 's' is a common misspelling for beginners.

Concept Overlap: Don't confuse it with 'desinfetar'. Disinfecting kills most germs; sterilizing kills ALL germs.

Animal Terms: While 'castrar' is common, 'esterilizar' is the preferred term in official animal welfare documents.

Errado: Eu preciso esterilisar as mãos. (Spelling error)

Correto: Eu preciso esterilizar as mãos antes da cirurgia.

Confusão: Vou esterilizar a louça com detergente. (Incorrect: Detergent only cleans/washes).

Uso Preciso: Vou esterilizar a louça na máquina com ciclo de alta temperatura.

Erro de Tradução: Ele foi esterilizado do grupo. (Incorrect: Use 'excluído' or 'banido' for social contexts).

To truly master the semantic field of hygiene and biology in Portuguese, you must understand how esterilizar compares to its synonyms and related terms. While 'esterilizar' is the most rigorous, other words are more suitable for daily chores. 'Limpar' is the general term for removing dirt. 'Lavar' specifically involves water and usually soap. 'Desinfetar' is the most common alternative; it means to kill most pathogenic microorganisms. You 'desinfeta' a bathroom floor, but you 'esteriliza' a scalpel. Another related term is 'higienizar', which has become very popular in corporate and health settings; it is a broader term that encompasses cleaning and disinfecting to make something safe for use. In a more technical or literary sense, you might encounter 'purificar' (to purify), which implies removing impurities, often used for water or air. When talking about milk or juice, the term 'pasteurizar' (to pasteurize) is a specific type of partial sterilization through heat that kills harmful bacteria without changing the food's properties as much as full sterilization would. In the context of animals, 'castrar' is the most frequent synonym used in daily life, though as mentioned, it is technically a subset of sterilization. For soil or environments, 'fomentar' or 'tratar' might be used, but 'esterilizar' remains the gold standard for total microbial elimination. Understanding these distinctions allows you to choose the word that accurately reflects the level of 'cleanliness' you are describing.

Esterilizar vs. Desinfetar: Esterilizar kills 100% of microbes including spores; desinfetar kills most but not all.

Esterilizar vs. Higienizar: Higienizar is a modern, 'softer' term used for hands or public spaces; esterilizar is clinical.

Esterilizar vs. Castrar: Castrar is specific to removing reproductive organs; esterilizar can also mean tying tubes.

Não basta apenas limpar a agulha; você realmente precisa esterilizar com fogo ou álcool forte.

O governo recomenda higienizar as mãos com álcool em gel frequentemente durante o dia.

Para manter a água potável, o filtro serve para purificar os resíduos e o cloro serve para desinfetar.

A usina utiliza calor para pasteurizar o leite antes de ele ser embalado para venda no supermercado.

Decidimos castrar nosso gato para evitar que ele fuja de casa e brigue na rua.

How Formal Is It?

Formal

Neutral

Informal

Child friendly

Slang

Fun Fact

The word originally had a purely agricultural meaning (land that couldn't grow crops) before it became a medical term in the 19th century with the germ theory of disease.

Pronunciation Guide

UK /iʃ.tɛ.ɾi.li.ˈzaɾ/

US /es.te.ɾi.li.ˈzaʁ/

The stress is on the final syllable 'zar'.

Rhymes With

analisar organizar realizar visualizar atualizar caracterizar utilizar finalizar

Common Errors

Pronouncing the 'z' like an 's'.
Stress on the 'li' syllable instead of 'zar'.
Making the 'e' sound like 'ee' as in English.
Silent final 'r' (it should be slightly audible).
Confusing the 'r' with a 'l' sound.

Difficulty Rating

Reading 2/5

Easy to recognize due to English cognate 'sterilize'.

Writing 3/5

The 'z' spelling and the suffix conjugation require attention.

Speaking 2/5

Regular pronunciation, but the final 'r' needs practice.

Listening 2/5

Clear sound, usually easy to catch in context.

What to Learn Next

Prerequisites

limpar água mãos médico saúde

Learn Next

desinfetar higienizar contaminação bactéria cirurgia

Advanced

aspssia antissepsia autoclave microorganismo patógeno

Grammar to Know

Regular -ar Verb Conjugation

Eu esterilizo, Tu esterilizas, Ele esteriliza...

Direct Transitive Verbs

Esterilizar (verbo) + o material (objeto direto).

Subjunctive Mood for Necessity

É preciso que ele esterilize a área.

Personal Infinitive

Para esterilizarmos tudo, precisamos de tempo.

Passive Voice with 'Ser'

O alicate foi esterilizado pela manicure.

Examples by Level

Eu vou esterilizar a mamadeira.

I am going to sterilize the baby bottle.

Simple future with 'vou' + infinitive.

Você esteriliza a agulha?

Do you sterilize the needle?

Present tense question.

Ela esteriliza os vidros de geleia.

She sterilizes the jam jars.

Third person singular present tense.

Nós esterilizamos o material.

We sterilize the material.

First person plural present tense.

Eles esterilizam tudo com álcool.

They sterilize everything with alcohol.

Third person plural present tense.

É bom esterilizar a chupeta.

It is good to sterilize the pacifier.

Impersonal expression with infinitive.

O médico vai esterilizar as mãos.

The doctor is going to sterilize his hands.

Future with 'vai' + infinitive.

Esterilize o alicate, por favor.

Sterilize the pliers, please.

Imperative mood for a request.

Ontem, eu esterilizei todos os instrumentos.

Yesterday, I sterilized all the instruments.

Pretérito Perfeito (Simple Past).

Nós vamos esterilizar a nossa gata amanhã.

We are going to spay our cat tomorrow.

Future plan using 'ir' + infinitive.

Você já esterilizou os potes de vidro?

Have you already sterilized the glass pots?

Past tense with the adverb 'já'.

O enfermeiro esterilizou a ferida com cuidado.

The nurse sterilized the wound carefully.

Third person singular past tense.

Eles não esterilizaram o equipamento corretamente.

They did not sterilize the equipment correctly.

Negative sentence in the past tense.

É preciso esterilizar a água antes de beber.

It is necessary to sterilize the water before drinking.

Impersonal 'é preciso' + infinitive.

Nós esterilizávamos as mamadeiras todas as noites.

We used to sterilize the baby bottles every night.

Pretérito Imperfeito (Past Habitual).

Esterilize o local antes de aplicar a injeção.

Sterilize the spot before applying the injection.

Imperative mood for instructions.

Se você não esterilizar o material, pode haver uma infecção.

If you don't sterilize the material, there could be an infection.

Conditional sentence with 'se' + future subjunctive.

O hospital decidiu esterilizar todas as salas de espera.

The hospital decided to sterilize all the waiting rooms.

Main verb + infinitive.

Espero que eles esterilizem os talheres do restaurante.

I hope they sterilize the restaurant's cutlery.

Present Subjunctive after 'espero que'.

A campanha para esterilizar animais de rua foi um sucesso.

The campaign to sterilize street animals was a success.

Infinitive used as a noun phrase.

Antigamente, era difícil esterilizar grandes volumes de líquido.

In the past, it was difficult to sterilize large volumes of liquid.

Imperfect tense with infinitive.

Para esterilizar os frascos, use vapor de água sob pressão.

To sterilize the jars, use pressurized water steam.

Purpose clause with 'para' + infinitive.

Embora tenha limpado, ele esqueceu de esterilizar a pinça.

Although he cleaned it, he forgot to sterilize the tweezers.

Concessive clause with 'embora'.

Nós esterilizaremos as sementes antes do plantio.

We will sterilize the seeds before planting.

Simple future tense.

É fundamental que a clínica esterilize os equipamentos diariamente.

It is fundamental that the clinic sterilize the equipment daily.

Present subjunctive after 'é fundamental que'.

Os cientistas conseguiram esterilizar o ambiente em poucos minutos.

The scientists managed to sterilize the environment in a few minutes.

Perfect past tense with 'conseguiram'.

Caso você esterilize o solo, as bactérias benéficas também morrerão.

In case you sterilize the soil, the beneficial bacteria will also die.

Subjunctive mood after 'caso'.

A técnica de esterilizar por radiação é muito eficaz na indústria.

The technique of sterilizing by radiation is very effective in industry.

Preposition 'de' + infinitive.

Eles teriam esterilizado o local se tivessem os produtos necessários.

They would have sterilized the place if they had the necessary products.

Conditional perfect with 'se' + pluperfect subjunctive.

A prefeitura quer esterilizar mil cães até o fim do ano.

The city hall wants to sterilize a thousand dogs by the end of the year.

Transitive verb with a large numeric object.

Não se pode operar sem antes esterilizar todo o bloco operatório.

One cannot operate without first sterilizing the entire operating block.

Passive 'se' + infinitive.

Ao esterilizar os alimentos, perdemos algumas vitaminas sensíveis ao calor.

By sterilizing the food, we lose some heat-sensitive vitamins.

Temporal 'ao' + infinitive.

A negligência ao esterilizar os materiais resultou em sanções graves.

Negligence when sterilizing the materials resulted in serious sanctions.

Infinitive as part of a complex noun phrase.

Seria prudente que o laboratório esterilizasse as amostras novamente.

It would be prudent for the laboratory to sterilize the samples again.

Imperfect subjunctive after 'seria prudente que'.

O debate foi esterilizado pela falta de argumentos fundamentados.

The debate was sterilized (made unproductive) by the lack of grounded arguments.

Metaphorical use in the passive voice.

É imperativo esterilizarmos os instrumentos antes que a contaminação se espalhe.

It is imperative that we sterilize the instruments before the contamination spreads.

Personal infinitive 'esterilizarmos'.

A autoclave é o método mais comum para esterilizar têxteis hospitalares.

The autoclave is the most common method to sterilize hospital textiles.

Technical terminology with infinitive.

Eles sugeriram esterilizar a zona de quarentena com raios ultravioleta.

They suggested sterilizing the quarantine zone with ultraviolet rays.

Infinitive after 'sugeriram'.

A eficácia de esterilizar superfícies depende do tempo de exposição.

The effectiveness of sterilizing surfaces depends on the exposure time.

Complex subject phrase with infinitive.

Apesar de esterilizarem o ar, o risco de vírus ainda persiste.

Despite sterilizing the air, the risk of viruses still persists.

Concessive 'apesar de' + personal infinitive.

A proposta visa esterilizar quaisquer vestígios de ideologia do currículo escolar.

The proposal aims to sterilize any traces of ideology from the school curriculum.

Highly metaphorical use for 'removing completely'.

Oxalá tivessem tido o cuidado de esterilizar os dutos de ventilação.

If only they had taken the care to sterilize the ventilation ducts.

Optative 'oxalá' with pluperfect subjunctive.

O processo de esterilizar a alma através da meditação é um conceito antigo.

The process of sterilizing the soul through meditation is an ancient concept.

Poetic/Metaphorical use.

A obrigatoriedade de esterilizar fêmeas errantes gera controvérsia ética.

The requirement to sterilize stray females generates ethical controversy.

Complex noun phrase with technical verb.

A indústria aeroespacial deve esterilizar sondas para evitar contaminação interplanetária.

The aerospace industry must sterilize probes to avoid interplanetary contamination.

Modal 'deve' + infinitive in technical context.

Não obstante a tentativa de esterilizar o ambiente, a cultura proliferou.

Notwithstanding the attempt to sterilize the environment, the culture proliferated.

Formal 'não obstante' + noun phrase + infinitive.

O autor buscou esterilizar sua linguagem de regionalismos excessivos.

The author sought to sterilize his language of excessive regionalisms.

Metaphorical use regarding linguistic style.

Haja o que houver, precisamos esterilizar o sistema antes do reinício.

Whatever happens, we need to sterilize the system before the restart.

Idiomatic 'haja o que houver' + technical infinitive.

Common Collocations

esterilizar instrumentos

esterilizar mamadeiras

esterilizar animais

esterilizar frascos

esterilizar agulhas

esterilizar o solo

esterilizar superfícies

esterilizar com álcool

esterilizar em autoclave

esterilizar a ferida

Common Phrases

Sala de esterilização

— A dedicated room in a clinic or hospital for cleaning tools.

O material já está na sala de esterilização.

Material esterilizado

— Equipment that has already undergone the sterilization process.

Por favor, traga o material esterilizado para a sala.

Ciclo de esterilização

— The specific time and process required by a machine to sterilize.

Aguarde o fim do ciclo de esterilização.

Campanha de esterilização

— A public event to neuter many pets at once.

Inscrevi meu cão na campanha de esterilização.

Esterilizar a frio

— To sterilize using chemicals instead of heat.

Alguns plásticos precisam esterilizar a frio.

Esterilizar por fervura

— The traditional method of sterilizing by boiling in water.

Antigamente, costumava-se esterilizar por fervura.

Esterilizador de mamadeira

— A specific appliance for cleaning baby bottles.

Comprei um esterilizador de mamadeira elétrico.

Indicador de esterilização

— A strip or tape that changes color when sterilization is successful.

Verifique o indicador de esterilização na embalagem.

Esterilização feminina

— The medical procedure for tubal ligation in women.

Ela optou pela esterilização feminina após o terceiro filho.

Esterilização masculina

— The medical procedure for vasectomy in men.

A esterilização masculina é um procedimento simples.

Often Confused With

esterilizar vs estilizar

To stylize (design). It sounds similar but has a completely different meaning.

esterilizar vs estatizar

To nationalize (politics). Only the suffix is similar.

esterilizar vs externar

To express or externalize. Often confused by very early beginners.

Idioms & Expressions

"Ambiente esterilizado"

— Metaphorically, a place that is too clean, boring, or lacks personality.

A decoração do escritório é tão impessoal que parece um ambiente esterilizado.

informal

"Esterilizar o pensamento"

— To remove all original or 'messy' ideas, making it bland.

A censura tentou esterilizar o pensamento dos artistas.

literary

"Mente esterilizada"

— A mind that lacks creativity or new ideas.

Depois de anos de rotina, ele sentia que tinha uma mente esterilizada.

informal

"Esterilizar a discussão"

— To stop a debate from progressing or becoming productive.

A burocracia acabou por esterilizar a discussão sobre a reforma.

formal

"Linguagem esterilizada"

— Language that is overly formal and lacks emotion or flavor.

O relatório foi escrito em uma linguagem esterilizada e fria.

neutral

"Esterilizar o futuro"

— To take actions that prevent any growth or progress in the future.

A falta de investimento pode esterilizar o futuro da empresa.

literary

"Amor esterilizado"

— A relationship that is perfectly clean on the outside but lacks passion.

Eles viviam um amor esterilizado, sem brigas mas sem fogo.

poetic

"Esterilizar a alma"

— To remove all desires or human 'impurities', often in a religious context.

O asceta buscava esterilizar a alma de todas as tentações mundanas.

literary

"Cultura esterilizada"

— A culture that has been stripped of its unique or controversial elements.

A globalização corre o risco de criar uma cultura esterilizada e igual em todo lugar.

formal

"Esterilizar o debate"

— To make a conversation useless or devoid of real meaning.

Interrupções constantes servem apenas para esterilizar o debate público.

neutral

Easily Confused

esterilizar vs desinfetar

Both involve cleaning germs.

Desinfetar kills many germs; esterilizar kills ALL germs and spores.

Desinfete o chão, mas esterilize o bisturi.

esterilizar vs castrar

Both used for animal reproduction.

Castrar is the physical removal of organs; esterilizar is any method of making sterile.

O gato foi castrado para não marcar território.

esterilizar vs higienizar

Broad cleaning term.

Higienizar is about making things safe/sanitary in a general sense.

Higienize as mãos antes de comer.

esterilizar vs limpar

Basic cleaning.

Limpar removes visible dirt; esterilizar removes invisible life.

Limpe a mesa antes de esterilizar os frascos nela.

esterilizar vs pasteurizar

Heat treatment of food.

Pasteurizar uses less heat to preserve flavor; esterilizar uses high heat to kill everything.

O leite pasteurizado precisa de geladeira.

Sentence Patterns

Eu vou [infinitive] [noun].

Eu vou esterilizar a mamadeira.

[Subject] [past tense] [noun] ontem.

O médico esterilizou a agulha ontem.

É importante [infinitive] para evitar [noun].

É importante esterilizar para evitar doenças.

Se você [future subjunctive], [future tense].

Se você esterilizar os potes, a geleia durará mais.

Duvido que [present subjunctive].

Duvido que eles esterilizem o material hoje.

O [noun] foi [past participle] por [agent].

O material foi esterilizado pelo técnico.

Ao [infinitive], deve-se observar [noun].

Ao esterilizar, deve-se observar a temperatura.

Não obstante [noun phrase], [clause].

Não obstante a esterilização, houve contaminação.

Word Family

Nouns

Verbs

Adjectives

How to Use It

frequency

Common in specific domains (health, pets, parenting).

Common Mistakes

Esterilisar → Esterilizar
The Portuguese suffix for 'to make something [adjective]' is '-izar', always with a 'z'.
Esterilizar a mesa (when just wiping) → Limpar a mesa
Esterilizar implies total microbial destruction, which a simple wipe doesn't do.
Eu esterilizo para a agulha → Eu esterilizo a agulha
The verb is direct transitive; it does not take the preposition 'para' for the object.
O gato foi esterilizado (meaning only female) → O gato foi castrado / esterilizado
While common, 'esterilizar' can technically apply to both genders, so don't assume gender based on the verb.
Esterilizar o texto → Revisar o texto
Using 'esterilizar' for text is very rare and means removing all character/life from it, not fixing errors.

Tips

Suffix Check

Verbs ending in '-izar' are almost always regular. If you know how to conjugate 'falar', you know how to conjugate 'esterilizar'.

Cognate Power

Use the similarity with 'sterilize' to your advantage, but remember the Portuguese 'e' at the beginning.

Pet Care

If you have a pet in a Portuguese-speaking country, look for 'Campanha de Esterilização' for cheaper vet services.

The 'Z' Rule

In Portuguese, the suffix is always '-izar'. Never use 's' like in the British English 'sterilise'.

Don't Overuse

Don't use 'esterilizar' for simple cleaning. It sounds too clinical for washing your car or a window.

Final 'R'

Make sure you pronounce the final 'r' in the infinitive 'esterilizar'. It shouldn't be totally silent.

Medical Accuracy

In a hospital, always be precise. 'Desinfetar' might not be enough if the doctor asked to 'esterilizar'.

Jam Making

When translating recipes, 'esterilizar os vidros' is the standard instruction for long-term food safety.

Beauty Safety

In Brazil, it's common to ask 'Os instrumentos são esterilizados em autoclave?' at the manicure.

Metaphorical Use

Use 'esterilizar' to describe a lack of creativity or productivity in high-level discussions.

Memorize It

Mnemonic

Think of 'Sterile' + 'Ization'. In Portuguese, it's 'Esteril' + 'izar'. The 'z' is like a lightning bolt that zaps all the germs away!

Visual Association

Imagine a shiny, silver medical tray glowing with a bright white light, symbolizing it is perfectly 'esterilizado'.

Word Web

hospital bactéria limpeza saúde autoclave higiene segurança laboratório

Challenge

Try to find three items in your kitchen that you would need to esterilizar if you were making jam, and say their names in Portuguese.

Word Origin

From the Latin word 'sterilis' meaning barren or unfruitful, combined with the suffix '-izar'.

Original meaning: To make something barren or incapable of producing life.

Romance (Latin root).

Cultural Context

Be careful when using this word in reference to humans; it should only be used in a medical or voluntary reproductive health context.

English speakers use 'spay' or 'neuter' for animals, but Portuguese often uses 'esterilizar' as a polite or technical blanket term.

Louis Pasteur's research (fundamental to the concept of sterilization). Joseph Lister (pioneer of antiseptic surgery). Public health campaigns by the SUS (Sistema Único de Saúde) in Brazil.

Practice in Real Life

Real-World Contexts

Medical / Hospital

Esterilizar o bisturi
Protocolo de esterilização
Material descartável ou esterilizar
Sala de esterilização central

Veterinary

Esterilizar a cadela
Custo da esterilização
Pós-operatório de esterilização
Campanha de esterilização gratuita

Kitchen / Cooking

Esterilizar frascos de vidro
Ferver para esterilizar
Esterilizar a tampa
Conservas seguras

Baby Care

Esterilizar a chupeta
Esterilizador de micro-ondas
Com que frequência esterilizar
Esterilizar mamadeiras novas

Beauty Salon

Esterilizar alicate de cutícula
Estufa para esterilizar
Utensílios esterilizados
Vigilância sanitária

Conversation Starters

"Você acha que é necessário esterilizar as mamadeiras todos os dias?"

"Quanto custa para esterilizar um gato nesta clínica?"

"Como você costuma esterilizar os vidros para fazer conserva?"

"Você já viu como eles fazem para esterilizar instrumentos no dentista?"

"É seguro esterilizar objetos de plástico no micro-ondas?"

Journal Prompts

Descreva a importância de esterilizar materiais em um hospital e o que aconteceria se isso fosse ignorado.

Escreva sobre uma experiência que você teve ao levar um animal de estimação para esterilizar.

Quais são as diferenças entre limpar, desinfetar e esterilizar na sua rotina diária?

Imagine que você é um cientista. Explique o processo que você usa para esterilizar seu laboratório.

Você acha que as campanhas para esterilizar animais de rua são eficazes na sua cidade? Por quê?

Frequently Asked Questions

10 questions

Embora usados como sinônimos para animais, castrar é a remoção dos órgãos reprodutores, enquanto esterilizar é o termo geral para tornar o animal estéril.

Geralmente não. Para casas, usamos 'limpar' ou 'desinfetar'. Esterilizar é reservado para contextos médicos ou de extrema higiene.

Eu esterilizei, você esterilizou, nós esterilizamos, eles esterilizaram.

Sim, ele segue exatamente o modelo dos verbos terminados em -ar, como 'falar'.

É o aparelho ou a substância usada para realizar o processo de esterilizar algo.

Sim, especialmente em contextos cirúrgicos onde se busca eliminar todos os microrganismos.

Sim, significa que algo pode passar pelo processo de esterilização sem ser destruído.

O substantivo é 'esterilização'.

Depende do tipo de plástico. Alguns derretem com o calor, então precisam de esterilização química.

Sim, um processo de esterilização correto elimina bactérias, fungos e vírus.