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B1 adjective #4,000 よく出る 11分で読める

prejudicial

上位4,000

練習する例文メモとヒント prejudicial 30秒で

解説 prejudicial in your Level:

At the A1 level, you should think of 'prejudicial' as a fancy way to say 'bad' (ruim) for something. Even though it is a long word, it is easy for English speakers to recognize. At this stage, you only need to know one common sentence: 'Fumar é prejudicial à saúde' (Smoking is harmful to health). You might see this on posters or signs. Just remember that it means something causes damage. You don't need to use it in your own speaking yet, but recognizing it will help you understand warnings in public places. It is an adjective, so it describes a thing. For example, 'comida prejudicial' (harmful food). At A1, focus on the fact that it is the opposite of 'bom' (good) or 'saudável' (healthy). If a teacher says 'Isso é prejudicial', they are telling you that what you are doing is not good for you or your learning. It is a useful word to know for basic health and safety conversations.

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At the A2 level, you can start using 'prejudicial' to describe habits and routines. You should learn that it stays the same for men and women: 'o hábito prejudicial' and 'a ação prejudicial'. However, if you are talking about more than one thing, it changes to 'prejudiciais'. For example, 'Doces são prejudiciais' (Sweets are harmful). You should also notice the word 'à' (with the accent) that often comes after it, especially in the phrase 'prejudicial à saúde'. At this level, you can use it to talk about simple cause-and-effect relationships: 'Dormir pouco é prejudicial para o trabalho' (Sleeping little is harmful for work). It helps you move beyond just saying 'bom' or 'mau' and makes your Portuguese sound more mature. You will hear it in doctor's offices or when people talk about the weather and crops, like 'Muita chuva é prejudicial para as flores'. Start including it in your descriptions of healthy and unhealthy lifestyles.

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As a B1 learner, 'prejudicial' becomes a key part of your vocabulary for discussing social issues, health, and the environment. You should be able to use it with different prepositions like 'a' and 'para'. You also need to be very careful not to confuse it with the English word 'prejudiced'. Remember, in Portuguese, 'prejudicial' only means 'harmful'. If you want to say someone is biased, use 'preconceituoso'. At B1, you can use adverbs to modify it: 'altamente prejudicial' (highly harmful) or 'muito prejudicial'. You should be comfortable using it in written assignments about the environment, such as 'A poluição é prejudicial aos rios'. You will also encounter it in news articles about the economy or politics. For example, 'A crise é prejudicial ao comércio'. This word allows you to express more complex opinions about why certain actions or policies are negative without just using the word 'negativo'. It adds a level of precision to your arguments about impact and consequences.

At the B2 level, you should master the nuances of 'prejudicial' in various registers. You should understand its use in formal documents, news reports, and professional settings. You should also be able to distinguish it from its synonyms like 'nocivo' (usually for physical or chemical harm) and 'danoso' (often for financial or legal damage). At this stage, you should use the correct 'crase' (à) instinctively when following the word with a feminine noun. You can use 'prejudicial' to discuss abstract concepts like 'prejudicial à reputação' (harmful to the reputation) or 'prejudicial ao desenvolvimento econômico'. You should also be aware of the word family, such as the verb 'prejudicar' (to harm/to hinder) and the noun 'prejuízo' (loss/damage). Being able to switch between these forms shows a high command of the language. In debates, you can use 'prejudicial' to argue against a point of view by highlighting the potential 'efeitos prejudiciais' of an opponent's proposal.

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For C1 learners, 'prejudicial' is a versatile tool for sophisticated analysis. You should understand its specific legal meaning, such as 'questão prejudicial', which refers to a preliminary point that must be decided before a main issue. You should be able to use the word in academic contexts to describe 'deletério' or 'adverso' effects. Your usage should be precise; you know that 'prejudicial' implies a causal link between an action and a negative outcome. You can use it in complex sentence structures, such as 'Não obstante as vantagens iniciais, o projeto revelou-se prejudicial a longo prazo' (Despite the initial advantages, the project proved to be harmful in the long run). You should also be sensitive to the cultural contexts where the word appears, such as in public health legislation or environmental impact reports. Your ability to use 'prejudicial' alongside other high-level adjectives like 'insidioso' or 'pernicioso' will demonstrate a deep and nuanced vocabulary.

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At the C2 level, you have a near-native grasp of 'prejudicial'. you understand all its subtle connotations and can use it with perfect grammatical accuracy in any context, from a casual conversation to a Supreme Court brief. You are aware of its etymological roots and how it has evolved in the Portuguese language compared to other Romance languages. You can use it rhetorically to emphasize the severity of a situation, perhaps using it in a series of adjectives for effect: 'uma política míope, retrógrada e profundamente prejudicial'. You understand how 'prejudicial' functions in the broader lexical field of 'harm', and you can effortlessly choose between 'prejudicial', 'lesivo', 'infesto', and 'desfavorável' to achieve the exact tone and precision required. You also recognize when 'prejudicial' might be used ironically or in specialized jargon within different professional fields. Your mastery of this word is not just about its meaning, but about its perfect integration into the rhythm and flow of high-level Portuguese discourse.

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練習する例文メモとヒント

prejudicial 30秒で

Prejudicial is a Portuguese adjective meaning 'harmful' or 'detrimental'. It is used across health, law, environment, and daily habits to warn of negative consequences.
It is a partial false friend; it does not mean 'prejudiced' (biased). For bias, use 'preconceituoso'. It only refers to the act of causing damage.
The word is gender-neutral (same for masculine and feminine) and changes to 'prejudiciais' in the plural. It usually takes the prepositions 'a' or 'para'.
You will see it most famously on Brazilian cigarette packs in the mandatory warning: 'O Ministério da Saúde adverte: fumar é prejudicial à saúde'.

The Portuguese word prejudicial is a high-frequency adjective that every intermediate learner must master. At its core, it describes anything that causes harm, damage, or detriment to a person, an object, a situation, or an abstract concept like health or the economy. While it looks identical to the English word 'prejudicial', its primary usage in Portuguese is much broader and more common in everyday life, whereas in English, 'prejudicial' often carries a heavy legal or social weight related to bias or prejudice. In Portuguese, if you drink too much soda, it is prejudicial. If you don't sleep enough, it is prejudicial. If a company makes a bad investment, that choice is prejudicial to its future.

Health and Wellness: This is perhaps the most common domain for the word. In Brazil and Portugal, you will see this word on every cigarette pack and in every medical advertisement. It is the standard way to say 'harmful to your health' (prejudicial à saúde). It covers everything from lack of exercise to toxic substances.

O consumo excessivo de açúcar é altamente prejudicial para o funcionamento do pâncreas.

Legal and Formal Contexts: In a courtroom or a business contract, 'prejudicial' refers to actions or evidence that might damage the interests of a party or the integrity of the process. It is used to describe a decision that negatively impacts a legal right or a financial standing.

Furthermore, the word is used in environmental discussions. When a chemical spill occurs, scientists describe the effects as 'prejudicial ao ecossistema'. It implies a lasting negative impact rather than just a temporary inconvenience. It is a serious word, but not an overly academic one; you will hear children being told that staring at the sun is 'prejudicial para os olhos'. It is versatile, ranging from the physiological to the metaphorical. In the workplace, a toxic atmosphere is 'prejudicial à produtividade'. In education, a lack of resources is 'prejudicial ao aprendizado'. The word carries an inherent warning: stop or avoid this thing, or there will be negative consequences.

A poluição sonora nas grandes cidades é prejudicial ao bem-estar mental dos moradores.

The False Friend Trap: English speakers often confuse 'prejudicial' with 'prejudiced'. If you want to say someone is biased or has a prejudice against a group, you should use 'preconceituoso'. Use 'prejudicial' only for the concept of 'harmful'. If a law is 'prejudicial', it means the law causes harm; it doesn't necessarily mean the law is biased (though it could be both).

Cortar investimentos em educação é prejudicial para o futuro do país.

A geada tardia foi extremamente prejudicial para a colheita de café deste ano.

Não use produtos químicos sem proteção, pois eles podem ser prejudiciais à sua pele.

Using prejudicial correctly requires understanding its grammatical behavior and the prepositions that typically follow it. In Portuguese, adjectives describing an effect on something else usually take a preposition. For 'prejudicial', you can use either a or para. The choice between them is often a matter of style, though 'a' is slightly more formal and frequently involves the 'crase' (the accent on the letter 'a'). For example, 'prejudicial à saúde' (harmful to health) is a set phrase seen everywhere.

Sentence Structure 1: Subject + Ser + Prejudicial: This is the simplest form. You state that something is harmful. 'Fumar é prejudicial.' (Smoking is harmful). In this case, the adjective is used absolutely, without specifying what it harms, though the context usually makes it clear.

Mentir constantemente em um relacionamento é prejudicial.

Sentence Structure 2: Noun + Prejudicial + (a/para) + Target: This is more specific. 'Um hábito prejudicial à coluna' (A habit harmful to the spine). Note how 'prejudicial' modifies the noun 'hábito' and then specifies the target of the harm.

When constructing complex sentences, you can use adverbs to modify the intensity of the harm. Words like 'extremamente', 'altamente', 'parcialmente', or 'potencialmente' are common companions. For instance, 'Esta nova lei é potencialmente prejudicial aos pequenos agricultores.' (This new law is potentially harmful to small farmers). This adds nuance to your Portuguese, allowing you to express degrees of damage.

O uso de pesticidas pode ser prejudicial para os insetos polinizadores.

Comparison and Contrast: You can use 'prejudicial' in comparisons: 'O sedentarismo é mais prejudicial do que se imagina.' (A sedentary lifestyle is more harmful than one imagines). This is a great way to use the word in argumentative essays or debates.

A falta de sono é prejudicial tanto para a memória quanto para o humor.

A exposição prolongada ao sol sem proteção é prejudicial à pele.

Decisões precipitadas podem ser prejudiciais ao sucesso da empresa.

If you spend a day in a Portuguese-speaking country, you will encounter prejudicial in a variety of real-world settings. It is not a word hidden in dusty books; it is active in the airwaves and on the streets. Understanding these contexts will help you recognize the tone and intent when the word is spoken. It usually signals a warning or a critical assessment of a situation.

On Television and News Media: News anchors frequently use this word when discussing public health crises, economic downturns, or environmental disasters. You might hear: 'O novo imposto será prejudicial para a classe média' (The new tax will be harmful to the middle class). It is a staple of political and economic commentary.

Especialistas afirmam que o desmatamento é prejudicial ao clima global.

In Medical Consultations: Doctors and nutritionists are primary users of 'prejudicial'. During a check-up, a doctor might say, 'Este nível de estresse é muito prejudicial ao seu coração.' It serves as a professional medical evaluation of a patient's habits or symptoms.

In the corporate world, you will hear it during strategy meetings. If a manager thinks a certain project is a waste of time or resources, they might label it as 'prejudicial aos nossos objetivos trimestrais'. It is a polite but firm way to criticize a proposal. Similarly, in the legal field, lawyers use it to describe evidence that might hurt their client's case (embora aqui o sentido se aproxime um pouco mais do 'prejudicial' jurídico do inglês, mas ainda focado no dano).

Atrasos constantes são prejudiciais para a imagem da empresa.

In Educational Settings: Teachers use it when talking to parents or students about study habits. 'Passar muitas horas jogando videogame pode ser prejudicial ao desempenho escolar' (Spending many hours playing video games can be harmful to school performance). It is used to guide and correct behavior.

O uso excessivo de redes sociais é prejudicial à saúde mental dos jovens.

A humidade excessiva é prejudicial para a conservação de livros antigos.

Não beba água gelada quando estiver com dor de garganta, pode ser prejudicial.

The most significant obstacle English speakers face with prejudicial is its status as a partial false cognate. In English, 'prejudicial' is frequently linked to 'prejudice' (social bias or discrimination). In Portuguese, if you want to say 'He is prejudiced against foreigners', you cannot use 'prejudicial'. You must use 'preconceituoso'. This is the single biggest mistake learners make. 'Prejudicial' only means harmful or damaging.

Mistake 1: Confusing Bias with Harm: Correct: 'Este comentário é preconceituoso' (This comment is biased/prejudiced). Incorrect: 'Este comentário é prejudicial' (unless you mean the comment is causing actual harm to someone's health or career, but even then, it doesn't mean 'biased').

Atenção: Não confunda prejudicial (harmful) com preconceituoso (biased).

Mistake 2: Gender Agreement Errors: Learners often try to change the ending to 'prejudiciala' for feminine nouns. Remember: adjectives ending in '-al' are invariable for gender. It is 'o sol prejudicial' and 'a chuva prejudicial'.

Another mistake involves the preposition. While English says 'harmful TO', Portuguese uses 'prejudicial A' or 'prejudicial PARA'. Beginners often forget the 'crase' when using 'a' with a feminine noun. For example, 'prejudicial à saúde' requires that back-tick accent because it's a combination of the preposition 'a' and the article 'a'. Skipping the accent is a common spelling error even for native speakers, but for a learner, mastering it shows a high level of proficiency.

Uso correto da crase: A radiação UV é prejudicial à pele (preposição 'a' + artigo 'a').

Mistake 3: Overuse: While 'prejudicial' is common, sometimes it's too heavy. If you just want to say something is 'bad' in a casual way, use 'ruim' or 'mal'. 'Prejudicial' implies a degree of serious damage. Using it for a slightly overcooked steak might sound a bit dramatic!

Evite dizer: 'Este filme é prejudicial' se você apenas quer dizer que o filme é chato.

Lembre-se: 'Prejudiciais' é o plural de prejudicial.

Cuidado com a tradução automática: nem sempre 'prejudicial' em inglês será prejudicial em português.

To truly sound like a native, you need to know when to use prejudicial and when to swap it for a synonym that might fit the context better. Portuguese is a rich language with many nuances for the concept of 'harmful'. Depending on whether you are talking about health, law, or general quality, your choice of word will change.

Nocivo: This is the closest synonym to 'prejudicial'. It is very common in biological and chemical contexts. 'Substâncias nocivas' (harmful substances). While 'prejudicial' is a general term for damage, 'nocivo' often implies something that is toxic or poisonous to a living organism.

O uso de agrotóxicos nocivos foi proibido nesta região.

Danoso: Coming from the word 'dano' (damage), this adjective is more common in legal and financial contexts. If a contract has a clause that costs you money, it is 'danoso'. It focuses on the 'loss' aspect of the harm.

Another interesting alternative is 'ruim'. While very basic, it is the most natural word for casual conversation. If a friend asks if drinking coffee late at night is bad, you'd likely say 'É ruim para o sono' before you'd say 'É prejudicial ao sono'. Save 'prejudicial' for when you want to sound more serious, authoritative, or precise. In academic writing, you might also see 'deletério', which is a very formal way of saying harmful, usually used in scientific papers to describe a process that causes gradual decay or destruction.

A inflação alta é extremamente danosa para o poder de compra.

Malfazejo: This is a literary and somewhat archaic term. It describes something that 'does ill'. You might find it in old novels or poetry. It carries a more personal or moral weight than the clinical 'prejudicial'.

O fumo passivo é tão nocivo quanto o fumo direto.

A falta de investimento pode ter efeitos deletérios a longo prazo.

Não tome decisões sob estresse, os resultados podem ser desastrosos.

How Formal Is It?

豆知識

Although it comes from the same root as 'prejudice' (preconceito), in Portuguese, the meaning shifted almost entirely to the 'harm' resulting from a bad situation, while 'preconceito' took over the social bias meaning.

発音ガイド

UK /pɾe.ʒu.di.siˈal/

US /pɾe.ʒu.di.siˈaw/

The stress is on the final syllable: -al.

韻が合う語

social especial final normal geral legal vital mental

よくある間違い

Pronouncing the 'j' like the English 'j' in 'judge' (it should be like the 's' in 'measure').
Stressing the wrong syllable (e.g., pre-JU-di-cial).
In Brazil, forgetting that the final 'l' sounds like 'u'.
In Portugal, making the 'e' too open (it should be more closed: /pɾe/).
Pronouncing the 'cia' as three syllables instead of a fast diphthong.

難易度

読解 2/5

Easy to recognize because of the English cognate.

ライティング 3/5

Requires knowledge of the 'crase' (à) and plural form.

スピーキング 3/5

Requires correct stress on the last syllable.

リスニング 2/5

Clear pronunciation, usually easy to pick out.

次に学ぶべきこと

前提知識

saúde mal ruim bom fazer

次に学ぶ

nocivo prejudicar prejuízo danoso benéfico

上級

deletério insidioso pernicioso imparcialidade jurisprudência

知っておくべき文法

Adjective Number Agreement

O hábito prejudicial -> Os hábitos prejudiciais.

Use of Crase

Prejudicial à (a + a) saúde.

Invariable Gender for Adjectives in -al

O sol (masc) é prejudicial. A chuva (fem) é prejudicial.

Prepositional Government (Regência)

Prejudicial a algo ou Prejudicial para algo.

Adverbial Modification

Altamente prejudicial, extremamente prejudicial.

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レベル別の例文

Fumar é prejudicial.

Smoking is harmful.

Simple subject + verb + adjective structure.

O sol forte é prejudicial.

Strong sun is harmful.

Adjective modifying the subject.

Comer muito doce é prejudicial.

Eating too many sweets is harmful.

Infinitival phrase as a subject.

Isto é prejudicial para você.

This is harmful for you.

Use of the preposition 'para' to indicate the target.

O sal é prejudicial à saúde.

Salt is harmful to health.

Common set phrase with 'à saúde'.

Beber álcool é prejudicial.

Drinking alcohol is harmful.

Gerund-like use of the infinitive 'beber'.

Este hábito é prejudicial.

This habit is harmful.

Demonstrative pronoun + noun + adjective.

A poluição é prejudicial.

Pollution is harmful.

Feminine noun with the same adjective form.

O barulho é prejudicial para o sono.

Noise is harmful for sleep.

Preposition 'para' followed by a noun.

Muitas horas de TV são prejudiciais.

Many hours of TV are harmful.

Plural form 'prejudiciais' matching 'horas'.

O frio intenso é prejudicial às plantas.

Intense cold is harmful to plants.

Use of 'às' (preposition 'a' + plural article 'as').

Não durma pouco, é prejudicial.

Don't sleep little, it is harmful.

Imperative mood followed by an explanation.

Produtos químicos são prejudiciais à pele.

Chemical products are harmful to the skin.

Plural agreement and 'à' crase.

O açúcar em excesso é prejudicial.

Excess sugar is harmful.

Prepositional phrase 'em excesso' modifying the subject.

Ficar sentado o dia todo é prejudicial.

Sitting all day is harmful.

Complex subject phrase.

A falta de água é prejudicial à vida.

The lack of water is harmful to life.

Abstract noun 'falta' as the subject.

O estresse no trabalho é prejudicial à saúde mental.

Stress at work is harmful to mental health.

Specific target 'saúde mental' with 'à'.

Esta decisão pode ser prejudicial para a empresa.

This decision can be harmful to the company.

Modal verb 'pode ser' expressing possibility.

O uso de plásticos é prejudicial ao meio ambiente.

The use of plastics is harmful to the environment.

Masculine target 'meio ambiente' with 'ao'.

Comentários negativos são prejudiciais ao clima da equipe.

Negative comments are harmful to the team climate.

Abstract target 'clima da equipe'.

Atrasos frequentes são prejudiciais à sua reputação.

Frequent delays are harmful to your reputation.

Possessive pronoun 'sua' with 'à'.

Uma dieta desequilibrada é prejudicial ao crescimento.

An unbalanced diet is harmful to growth.

Adjective 'desequilibrada' modifying 'dieta'.

A falta de exercícios é prejudicial ao coração.

Lack of exercise is harmful to the heart.

Anatomical target 'coração'.

O excesso de luz azul é prejudicial aos olhos.

Excess blue light is harmful to the eyes.

Plural target 'olhos' with 'aos'.

A inflação alta é extremamente prejudicial ao poder de compra.

High inflation is extremely harmful to purchasing power.

Adverb 'extremamente' modifying the adjective.

O desmatamento da Amazônia é prejudicial ao equilíbrio climático.

Deforestation in the Amazon is harmful to climate balance.

Complex noun phrase as subject.

Tal atitude pode ser prejudicial ao andamento do processo.

Such an attitude can be harmful to the progress of the process.

Formal word 'andamento' and 'processo'.

A pirataria é prejudicial para a indústria cinematográfica.

Piracy is harmful to the film industry.

Economic context.

Substâncias químicas prejudiciais foram encontradas no rio.

Harmful chemical substances were found in the river.

Adjective following the noun in a passive voice sentence.

O isolamento social pode ser prejudicial aos idosos.

Social isolation can be harmful to the elderly.

Sociological context.

A falta de transparência é prejudicial à democracia.

Lack of transparency is harmful to democracy.

Political context.

O uso de termos técnicos pode ser prejudicial à comunicação.

The use of technical terms can be harmful to communication.

Linguistic context.

A exposição prolongada a este gás é altamente prejudicial à saúde pulmonar.

Prolonged exposure to this gas is highly harmful to lung health.

Scientific precision in the target 'saúde pulmonar'.

A medida provisória foi considerada prejudicial aos interesses nacionais.

The provisional measure was considered harmful to national interests.

Passive voice 'foi considerada'.

O sedentarismo é um dos fatores mais prejudiciais na sociedade moderna.

A sedentary lifestyle is one of the most harmful factors in modern society.

Superlative construction 'um dos mais'.

A geada tardia provou ser prejudicial para a flora local.

The late frost proved to be harmful to the local flora.

Verb 'provar ser' (to prove to be).

O conflito de interesses é prejudicial à imparcialidade do juiz.

Conflict of interest is harmful to the judge's impartiality.

Legal terminology 'imparcialidade'.

A poluição sonora é prejudicial ao desenvolvimento cognitivo das crianças.

Noise pollution is harmful to children's cognitive development.

Psychological terminology 'desenvolvimento cognitivo'.

A instabilidade política é prejudicial ao investimento estrangeiro.

Political instability is harmful to foreign investment.

Macroeconomic context.

O consumo de notícias falsas é prejudicial ao debate público.

The consumption of fake news is harmful to public debate.

Social media context.

A decisão do tribunal superior pode ter um efeito prejudicial cascata em casos futuros.

The high court's decision may have a harmful cascade effect on future cases.

Complex metaphor 'efeito cascata'.

A erosão constante do solo é prejudicial à sustentabilidade da agricultura orgânica.

Constant soil erosion is harmful to the sustainability of organic agriculture.

Environmental science context.

O protecionismo econômico é muitas vezes prejudicial à eficiência global do mercado.

Economic protectionism is often harmful to global market efficiency.

Economic theory context.

A falta de investimento em pesquisa básica é prejudicial ao progresso científico a longo prazo.

Lack of investment in basic research is harmful to long-term scientific progress.

Temporal phrase 'a longo prazo'.

A monocultura é prejudicial à biodiversidade e à resiliência dos ecossistemas.

Monoculture is harmful to biodiversity and ecosystem resilience.

Double target with 'à' and 'à'.

A corrupção sistêmica é profundamente prejudicial ao tecido social de uma nação.

Systemic corruption is deeply harmful to the social fabric of a nation.

Metaphorical use of 'tecido social'.

A obsolescência programada é prejudicial ao meio ambiente e ao bolso do consumidor.

Planned obsolescence is harmful to the environment and the consumer's pocket.

Colloquialism 'bolso do consumidor' in a formal context.

A supressão da liberdade de expressão é prejudicial à evolução intelectual da humanidade.

The suppression of freedom of expression is harmful to the intellectual evolution of humanity.

Philosophical and grand scope.

よく使う組み合わせ

prejudicial à saúde

altamente prejudicial

prejudicial ao meio ambiente

efeito prejudicial

extremamente prejudicial

prejudicial aos interesses

prejudicial ao desenvolvimento

potencialmente prejudicial

prejudicial à imagem

prejudicial à concorrência

よく使うフレーズ

É prejudicial.

— It is harmful. Used as a simple warning.

Não faça isso, é prejudicial.

Nada prejudicial.

— Nothing harmful. Used to reassure someone.

O exame não mostrou nada prejudicial.

Altamente prejudicial.

— Highly harmful. Used to emphasize severe danger.

Este vírus é altamente prejudicial.

Prejudicial à saúde.

— Harmful to health. The most common medical warning.

O excesso de sal é prejudicial à saúde.

Prejudicial ao negócio.

— Harmful to the business. Used in corporate settings.

Atrasos são prejudiciais ao negócio.

Prejudicial à vista.

— Harmful to the eyesight. Common warning about screens or sun.

Ler no escuro é prejudicial à vista.

Prejudicial ao processo.

— Harmful to the process. Used in legal or administrative contexts.

Essa prova é prejudicial ao processo.

Prejudicial à reputação.

— Harmful to the reputation. Used in social or professional contexts.

Mentiras são prejudiciais à reputação.

Prejudicial ao clima.

— Harmful to the climate. Used in environmental or office atmosphere contexts.

Discussões são prejudiciais ao clima da empresa.

Prejudicial ao futuro.

— Harmful to the future. Used for long-term warnings.

A falta de estudo é prejudicial ao futuro.

よく混同される語

prejudicial vs preconceituoso

Preconceituoso means 'prejudiced' or 'biased'. Prejudicial means 'harmful'. This is the most common error.

prejudicial vs prejudicado

Prejudicado is the person or thing that WAS harmed. Prejudicial is the thing THAT harms.

prejudicial vs prejuízo

Prejuízo is the noun (the loss/damage). Prejudicial is the adjective (the quality of causing harm).

慣用句と表現

"dar um tiro no pé"

— To shoot oneself in the foot. This is an idiomatic way to describe an action that is 'prejudicial' to oneself.

Ele deu um tiro no pé com aquele comentário prejudicial.

informal

"botar lenha na fogueira"

— To add fuel to the fire. An action that is prejudicial to a conflict.

Falar sobre política agora é prejudicial, só vai botar lenha na fogueira.

informal

"fazer um mau juízo"

— To make a bad judgment. Often leads to a 'decisão prejudicial'.

Ele fez um mau juízo e tomou uma decisão prejudicial.

neutral

"sair o tiro pela culatra"

— To backfire. When an action intended to help becomes prejudicial.

A estratégia era boa, mas o tiro saiu pela culatra e foi prejudicial.

informal

"ficar no prejuízo"

— To be at a loss. The result of something prejudicial.

Depois do investimento prejudicial, ele ficou no prejuízo.

neutral

"prejudicar o andamento"

— To hinder the progress. A common formal phrase.

A greve vai prejudicar o andamento das obras.

formal

"cortar a própria carne"

— To cut one's own flesh. To take a painful action that is prejudicial in the short term for long-term gain.

A empresa teve que cortar a própria carne com demissões prejudiciais.

literary

"fazer vista grossa"

— To turn a blind eye. Ignoring something that is prejudicial.

Eles fizeram vista grossa para o hábito prejudicial do filho.

informal

"chover no molhado"

— To rain on the wet. Doing something redundant that might be prejudicial to efficiency.

Explicar isso de novo é chover no molhado e prejudicial ao tempo.

informal

"pisar em ovos"

— To walk on eggshells. Trying to avoid a 'situação prejudicial'.

Na reunião, tive que pisar em ovos para não ser prejudicial.

informal

間違えやすい

prejudicial vs preconceituoso

Looks like the English word 'prejudiced'.

In Portuguese, 'prejudicial' refers to harm or damage, while 'preconceituoso' refers to having a social bias or prejudice against someone. You cannot use 'prejudicial' to describe a racist person; you must use 'preconceituoso'.

Ele é preconceituoso (biased). Fumar é prejudicial (harmful).

prejudicial vs nocivo

They are near-synonyms.

Nocivo is more clinical and often relates to toxins or biological harm. Prejudicial is broader and can include financial, legal, or social harm. You use 'nocivo' for a poisonous gas and 'prejudicial' for a bad business decision.

Gás nocivo. Decisão prejudicial.

prejudicial vs danoso

Both mean causing harm.

Danoso is specifically related to 'dano' (legal or material damage). It is more common in law and insurance. Prejudicial is more common in health and general conversation.

A cláusula é danosa ao contrato.

prejudicial vs ruim

Both mean 'bad'.

Ruim is very general and informal. Prejudicial is more precise and implies a serious negative impact. If a movie is bad, it's 'ruim'. If a movie's message encourages dangerous behavior, it's 'prejudicial'.

O filme é ruim. O hábito é prejudicial.

prejudicial vs maléfico

Both imply harm.

Maléfico has a literary or supernatural tone, often implying intent to do evil. Prejudicial is neutral and describes the effect regardless of intent.

Um feitiço maléfico. Um efeito prejudicial.

文型パターン

[Substantivo] é prejudicial.

Fumar é prejudicial.

[Substantivo] é prejudicial para [Pessoa/Coisa].

O sal é prejudicial para você.

[Substantivo] é prejudicial à [Substantivo Feminino].

O estresse é prejudicial à saúde.

[Substantivo] é prejudicial ao [Substantivo Masculino].

O plástico é prejudicial ao mar.

[Advérbio] prejudicial [Preposição] [Alvo].

Altamente prejudicial à economia.

Considerar [Algo] prejudicial.

O juiz considerou a prova prejudicial.

Ter um efeito prejudicial em [Algo].

A crise teve um efeito prejudicial no mercado.

Revelar-se prejudicial a longo prazo.

A medida revelou-se prejudicial a longo prazo.

語族

名詞

prejuízo (damage, loss, harm)

prejudicação (act of harming - rare)

prejudicialidade (state of being harmful)

動詞

prejudicar (to harm, to damage, to hinder)

形容詞

prejudicado (harmed, damaged - past participle used as adjective)

使い方

frequency

Very high, especially in health, legal, and environmental contexts.

よくある間違い

Ele é prejudicial contra estrangeiros. → Ele é preconceituoso contra estrangeiros.
You used the word for 'harmful' when you meant 'prejudiced'. Use 'preconceituoso' for social bias.
Fumar é prejudiciala. → Fumar é prejudicial.
You tried to make the adjective feminine. Adjectives ending in -al do not change for gender.
Estes hábitos são prejudicials. → Estes hábitos são prejudiciais.
The plural of words ending in -al is -ais, not -als.
Isso é prejudicial a saúde. → Isso é prejudicial à saúde.
You missed the 'crase' accent. It is a combination of the preposition 'a' and the article 'a'.
O efeito é muito prejudicante. → O efeito é muito prejudicial.
You invented a word based on the verb 'prejudicar'. The correct adjective is 'prejudicial'.

ヒント

Master the Plural

Always remember that adjectives ending in 'l' change to 'is' in the plural. Practice saying 'efeitos prejudiciais' until it feels natural. This is a key marker of intermediate proficiency.

Avoid the False Friend

Never use 'prejudicial' to mean 'biased'. If you are talking about social prejudice, use 'preconceito' (noun) or 'preconceituoso' (adjective). This keeps your meaning clear and accurate.

Stress the End

Portuguese words ending in 'l' almost always have the stress on the last syllable. Say 'pre-ju-di-ci-AL'. If you stress the middle, people might not understand you immediately.

Use with Crase

In formal writing, 'prejudicial à saúde' is the gold standard. Mastering the use of the 'crase' accent here will make your Portuguese look much more professional and correct.

Casual Alternatives

In very casual situations, you can just say 'faz mal' (it does harm/it's bad for you). While 'prejudicial' is correct, 'isso faz mal' is the most common way to warn a friend.

Medical Contexts

If you are at a doctor's office, use 'prejudicial' to describe your symptoms or habits. It sounds more precise and helps the doctor understand you are talking about health impacts.

Legal Nuance

In a legal context, 'prejudicial' refers to something that hinders a right. If you are dealing with contracts, look for this word to see if a clause might be damaging to you.

Link to Prejuízo

Connect 'prejudicial' to 'prejuízo' (financial loss). If you lose money, it's a 'prejuízo'. If an action causes that loss, the action is 'prejudicial'. This link helps remember both words.

Variety in Synonyms

Don't over-rely on 'prejudicial'. Mix in 'nocivo' for chemicals and 'danoso' for money. This variety makes your speech and writing more interesting and native-like.

Eco-Warnings

When talking about the environment, 'prejudicial ao meio ambiente' is the standard phrase. Use it in discussions about sustainability or pollution to sound well-informed.

暗記しよう

記憶術

Think of the word 'JUDGE'. If you judge someone before knowing them, you cause 'PRE-JUDICIAL' harm. In Portuguese, focus on the HARM (prejudicial = harmful).

視覚的連想

Imagine a cigarette pack with a big skull. Next to the skull, the word PREJUDICIAL is written in bold red letters.

Word Web

saúde dano fumar ruim nocivo prejuízo prejudicar lei

チャレンジ

Write three things in your life that are 'prejudiciais' (like coffee at night) and three things that are 'benéficas' (like exercise).

語源

From the Latin 'praeiudicialis', derived from 'praeiudicium' (pre-judgment). It entered Portuguese through the legal and scholarly traditions of the Middle Ages.

元の意味： Originally referred to something that happens before a judgment or that influences a judgment beforehand.

It belongs to the Romance family, with cognates in French (préjudiciable), Spanish (perjudicial), and Italian (pregiudizievole).

文化的な背景

When discussing 'prejudicial' in social contexts, remember it refers to harm, not bias. Using it to describe a person (e.g., 'Ele é prejudicial') means that person causes harm, which is a very strong personal attack.

English speakers must be careful not to use this for 'prejudice'. In English, 'prejudicial' is rare in daily talk, but in Portuguese, it is everyday vocabulary.

The mandatory warning on Brazilian cigarette packs: 'Fumar é prejudicial à saúde'. Legal texts in the Brazilian Constitution regarding actions 'prejudiciais ao interesse público'. Educational campaigns about 'hábitos prejudiciais' in schools.

実生活で練習する

実際の使用場面

Health and Medicine

prejudicial à saúde
hábito prejudicial
substância prejudicial
efeito prejudicial

Law and Justice

questão prejudicial
prejudicial ao processo
prova prejudicial
decisão prejudicial

Environment

prejudicial ao ecossistema
poluição prejudicial
impacto prejudicial
prejudicial à fauna

Business and Economy

prejudicial aos lucros
investimento prejudicial
prejudicial à imagem
concorrência prejudicial

Education

prejudicial ao aprendizado
comportamento prejudicial
falta prejudicial
método prejudicial

会話のきっかけ

"Você acha que as redes sociais são prejudiciais para as crianças?"

"Quais hábitos você considera mais prejudiciais à produtividade?"

"Você já teve algum hábito prejudicial que conseguiu mudar?"

"Na sua opinião, o açúcar é mais prejudicial que a gordura?"

"Como podemos evitar comportamentos prejudiciais no ambiente de trabalho?"

日記のテーマ

Reflita sobre um hábito que você tem e que pode ser prejudicial ao seu futuro. Como você pode mudá-lo?

Descreva uma decisão que parecia boa no início, mas que se revelou prejudicial a longo prazo.

Escreva sobre o impacto prejudicial da poluição na sua cidade e sugira uma solução.

Como o estresse excessivo pode ser prejudicial para os relacionamentos pessoais? Dê exemplos.

Pense em uma lei ou regra que você considera prejudicial para a sociedade e explique o porquê.

よくある質問

10 問

No, it does not. This is a common mistake for English speakers. In Portuguese, 'prejudicial' means 'harmful' or 'detrimental'. If you want to say someone is prejudiced or biased, you should use the word 'preconceituoso'. For example, 'Fumar é prejudicial' means 'Smoking is harmful', not 'Smoking is biased'.

To make 'prejudicial' plural, you drop the final 'l' and add 'is'. So, the plural form is 'prejudiciais'. This rule applies to most Portuguese adjectives ending in 'al', such as 'social' (sociais) and 'geral' (gerais). For example, 'hábitos prejudiciais' (harmful habits).

It is both! Adjectives ending in 'al' in Portuguese have only one form for both genders. You say 'o sol prejudicial' (masculine) and 'a chuva prejudicial' (feminine). You don't need to change the ending based on the gender of the noun it describes.

You use 'à' (with the crase accent) when 'prejudicial' is followed by a feminine singular noun that requires the definite article 'a'. The most common example is 'prejudicial à saúde'. This 'à' is the combination of the preposition 'a' (to) and the article 'a' (the).

Yes, but it is very strong. If you say 'Ele é prejudicial para a equipe', it means that person's presence or actions are damaging the team's success or health. It is a serious criticism and should be used with caution.

They are very similar, but 'nocivo' is often used for biological, chemical, or toxic harm (like 'gás nocivo'), while 'prejudicial' is more general and can apply to health, economy, law, or personal habits. In many cases, they are interchangeable, but 'prejudicial' is more common in daily warnings.

It is slightly more formal than 'ruim' or 'mau', but it is very common in everyday speech, especially when talking about health. You will hear it in news reports, doctor's offices, and formal documents, but also in conversations between parents and children.

The most common prepositions are 'a' and 'para'. For example: 'prejudicial a você' or 'prejudicial para você'. When using 'a' before a feminine noun like 'saúde', it becomes 'à' (prejudicial à saúde).

No, 'prejudicial' is an adjective. The adverbial form is 'prejudicialmente', which means 'harmfully' or 'detrimentally'. For example, 'Isso afetou prejudicialmente o projeto'.

You will see it most frequently on cigarette packaging and in health advertisements. The phrase 'O Ministério da Saúde adverte: fumar é prejudicial à saúde' is seen by millions of Brazilians every day.

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