irracional 30초 만에

  • Lacking logic or reason.
  • Driven by emotion or impulse.
  • Not sensible or sound.
  • Opposite of rational.
Meaning
The Portuguese word 'irracional' translates to 'irrational' in English. It describes something that lacks logic, reason, or sense. It's used to characterize actions, decisions, emotions, or even thoughts that are not based on sound judgment or objective evidence. When something is described as irrational, it suggests it's driven by impulse, emotion, or a flawed understanding of a situation, rather than by careful consideration or a rational thought process. This term is frequently employed in discussions about human behavior, psychological states, and even in evaluating the validity of arguments or proposals.
Usage Scenarios
You'll hear 'irracional' used in various contexts. For instance, someone might describe an outburst of anger as 'uma reação irracional' (an irrational reaction) if it seems disproportionate to the situation. In a debate, a weak argument might be dismissed as 'um argumento irracional'. When discussing financial decisions, a risky investment made without proper analysis could be labeled 'uma decisão de investimento irracional'. It's also applicable to fears or phobias that don't seem to have a logical basis, such as 'um medo irracional de aranhas' (an irrational fear of spiders). In everyday conversation, it's a useful adjective to express that something doesn't make sense or is hard to explain logically. It can also be used to describe a person's overall demeanor if they frequently act without clear reasoning.
Nuance
While 'irracional' directly means lacking reason, its connotation can range from a mild observation that something is slightly illogical to a strong criticism of something being completely nonsensical. The context will determine the severity of the judgment. It's important to note that what one person considers irrational, another might see as a valid emotional response or a creative, unconventional approach. Therefore, its application often involves a degree of subjectivity. It's a versatile word that allows speakers to convey a lack of logical coherence in a wide array of situations, from minor everyday occurrences to significant behavioral patterns.

A decisão dele de investir todo o dinheiro numa ideia sem pesquisa parecia completamente irracional.

Seu medo de altura é tão intenso que é considerado irracional pelos médicos.

O comportamento do torcedor após a derrota foi irracional.

Related Concepts
The concept of irrationality is explored in psychology, philosophy, and economics. In psychology, it can relate to cognitive biases or emotional dysregulation. Philosophers might discuss the nature of reason versus emotion. In economics, behavioral economics often studies irrational decision-making by consumers and investors. Understanding 'irracional' helps in analyzing these fields and recognizing behaviors that deviate from purely logical models.
Basic Structure
'Irracional' is an adjective, so it typically follows a noun or a linking verb like 'ser' (to be) or 'estar' (to be). When used with 'ser', it often describes an inherent characteristic or a judgment about something. When used with 'estar', it might describe a temporary state or a perceived irrationality in a specific moment.
Agreement
As an adjective in Portuguese, 'irracional' agrees in gender and number with the noun it modifies. However, 'irracional' is one of those adjectives that doesn't change for gender. It remains 'irracional' for both masculine and feminine singular nouns. The plural form is 'irracionais' for both masculine and feminine plural nouns. For example, 'um medo irracional' (an irrational fear - masculine singular), 'uma reação irracional' (an irrational reaction - feminine singular), 'sentimentos irracionais' (irrational feelings - masculine plural), 'ideias irracionais' (irrational ideas - feminine plural).
Examples in Context
When describing actions: "Seu comportamento naquela reunião foi completamente irracional." (His behavior in that meeting was completely irrational.) When describing emotions or feelings: "É normal sentir ansiedade, mas o pânico que ela sente é irracional." (It's normal to feel anxiety, but the panic she feels is irrational.) When describing thoughts or ideas: "A teoria de que a Terra é plana é irracional e não tem base científica." (The theory that the Earth is flat is irrational and has no scientific basis.) When describing decisions: "Tomar essa decisão sem pensar nas consequências seria irracional." (Making that decision without thinking about the consequences would be irrational.) When describing fears: "Ele tem um medo irracional de palhaços desde criança." (He has an irrational fear of clowns since childhood.)
Connecting Clauses
You can connect 'irracional' to other parts of a sentence using conjunctions or relative clauses. For example: "Apesar de todos os avisos, ele agiu de forma irracional, o que levou a problemas." (Despite all the warnings, he acted irrationally, which led to problems.) "Não consigo entender a lógica por trás de uma escolha tão irracional." (I can't understand the logic behind such an irrational choice.)

A compra impulsiva foi uma decisão irracional.

Sentir medo de borboletas é um pouco irracional.

Os argumentos apresentados eram irracionais e sem fundamento.

Everyday Conversations
In daily life, 'irracional' is often used to comment on behaviors or decisions that seem illogical. For example, if someone spends a lot of money on something they don't need, a friend might say, "Foi uma compra meio irracional, não acha?" (It was a rather irrational purchase, don't you think?). Or, if someone gets overly upset about a minor issue, you might hear, "A reação dele foi um pouco irracional." (His reaction was a bit irrational.) It's a common way to express mild surprise or disagreement with a lack of logic.
Media and News
News reports and opinion pieces frequently use 'irracional' when discussing political decisions, economic policies, or social trends. An article might describe a government's decision as "uma política irracional" if it's seen as counterproductive or lacking foresight. Similarly, public reactions to events can be labeled as 'irracional' if they appear to be driven by mass hysteria or unfounded fears. This term adds a critical layer to the analysis of events, suggesting a departure from sensible judgment.
Psychology and Self-Help
In discussions about mental health and well-being, 'irracional' is common. Therapists might help clients identify and challenge 'pensamentos irracionais' (irrational thoughts) that contribute to anxiety or depression. Books and articles on psychology often use the term to explain phobias, obsessive-compulsive behaviors, or irrational beliefs that negatively impact a person's life. It's a key term in understanding cognitive distortions.
Literature and Film
Authors and screenwriters use 'irracional' to describe characters' motivations or actions that drive the plot forward in unexpected ways. A character might act 'de forma irracional' to create drama or reveal a hidden aspect of their personality. The word helps to highlight moments of intense emotion, madness, or defiance against logic, making the narrative more compelling.
Academic Discussions
In fields like philosophy, sociology, and economics, 'irracional' is used to analyze human behavior that deviates from purely rational models. For example, economists might study 'comportamento irracional do consumidor' (irrational consumer behavior) to understand market dynamics better. Philosophers might debate the role of irrationality in human decision-making. It's a term used to categorize and examine phenomena that don't fit neatly into logical frameworks.

O noticiário frequentemente discute decisões políticas irracionais.

Psicólogos ajudam pacientes a lidar com medos irracionais.

Muitas vezes, a ficção explora personagens com motivações irracionais.

Confusing with 'Ilógico' or 'Sem Sentido'
While 'ilógico' (illogical) and 'sem sentido' (senseless/meaningless) are related, 'irracional' often carries a stronger implication of being driven by emotion or impulse rather than a simple lack of logic. Something can be 'ilógico' because of a faulty reasoning process, but 'irracional' suggests a deeper, often emotional, disconnect from reason. For instance, a mathematical proof can be 'ilógico' if there's an error in its steps. However, a sudden outburst of anger might be described as 'irracional' because it stems from an emotional state, not just a flawed calculation. 'Sem sentido' is broader and can apply to things that are nonsensical or pointless, whereas 'irracional' specifically points to a lack of rational thought.
Gender and Number Agreement Errors
As mentioned, 'irracional' is invariable for gender (it's the same for masculine and feminine). The plural form is 'irracionais'. A common mistake is to try and change the ending for feminine nouns, such as saying 'irracionala' (which is incorrect). Always remember: 'um homem irracional', 'uma mulher irracional', 'homens irracionais', 'mulheres irracionais'. The form stays the same. The only change is to the plural: 'irracionais'.
Overusing the Term
While 'irracional' is a useful word, it can be overused to dismiss opinions or behaviors that one simply disagrees with. It's important to distinguish between something that is genuinely lacking in reason and something that is merely an unconventional or unpopular viewpoint. Labeling everything you disagree with as 'irracional' can shut down productive discussion. Consider if the behavior or idea is truly devoid of logic, or if it's just a different perspective.
Confusing with 'Absurdo'
'Absurdo' means absurd, ridiculous, or preposterous. While an irrational action can certainly be absurd, 'absurdo' focuses more on the ridiculousness or nonsensical nature of something, often to the point of being comical or unbelievable. 'Irracional' is more about the lack of logical foundation. Something can be irrational without being overtly absurd, and something can be absurd without necessarily being irrational (e.g., a surreal piece of art). Use 'irracional' when the lack of reason is the primary characteristic.
Misinterpreting Emotional Responses
It's crucial to be mindful that what seems irrational to an observer might be a deeply felt emotional response for the person experiencing it. While 'irracional' is used to describe the *lack* of logic, it's important not to use it dismissively or judgmentally towards someone's genuine feelings, especially in sensitive contexts. For example, grief or extreme fear, while intense, might not be considered 'irrational' in the context of the situation, even if they seem disproportionate to an outsider.

Mistake: A decisão dela foi irracionala.

Correct: A decisão dela foi irracional.

Comparing 'irracional' and 'absurdo': 'Seu medo de altura é irracional, mas a situação em si não é absurda.

Ilógico
'Ilógico' means illogical. It describes something that does not follow the rules of logic or reasoning. While 'irracional' often implies an emotional or impulsive basis for the lack of logic, 'ilógico' can simply refer to a flaw in the reasoning process itself.
Example: "O argumento dele é ilógico porque contradiz os fatos." (His argument is illogical because it contradicts the facts.)
Comparison: 'Irracional' often suggests a deeper, perhaps emotional, detachment from reason, while 'ilógico' points to a specific flaw in the reasoning chain.
Sem sentido
'Sem sentido' translates to senseless, meaningless, or nonsensical. This term is broader and can apply to anything that lacks purpose, logic, or coherence. It can describe an action, a statement, or even a situation that is incomprehensible or pointless.
Example: "Jogar dinheiro fora dessa maneira é sem sentido." (Throwing money away like that is senseless.)
Comparison: 'Sem sentido' is a more general term for lack of meaning or logic, whereas 'irracional' specifically refers to the absence of rational thought processes.
Absurdo
'Absurdo' means absurd, ridiculous, or preposterous. It highlights the comical, unbelievable, or nonsensical nature of something. An irrational act can often be absurd, but 'absurdo' emphasizes the extremity of the lack of sense.
Example: "A ideia de que unicórnios existem é completamente absurda." (The idea that unicorns exist is completely absurd.)
Comparison: 'Absurdo' focuses on the ridiculousness, while 'irracional' focuses on the lack of logical foundation. An irrational decision might be quite serious, not necessarily absurd.
Inconsciente
'Inconsciente' means unconscious or unaware. In a psychological context, it refers to thoughts, feelings, or motivations that are not in a person's awareness. While unconscious drives can lead to irrational behavior, 'inconsciente' itself describes the state of not being conscious, rather than the lack of reason.
Example: "Muitas de nossas ações são influenciadas por fatores inconscientes." (Many of our actions are influenced by unconscious factors.)
Comparison: 'Inconsciente' refers to the hidden mental processes, while 'irracional' describes the resulting behavior or thought process that lacks logic.
Impulsivo
'Impulsivo' means impulsive. It describes someone who acts on sudden urges or desires without much thought or planning. Impulsive actions are often irrational because they bypass rational consideration of consequences.
Example: "Ele é muito impulsivo e compra coisas sem pensar." (He is very impulsive and buys things without thinking.)
Comparison: 'Impulsivo' describes the manner of acting (sudden urge), which frequently *leads* to irrational behavior. 'Irracional' describes the behavior itself as lacking reason.

A decisão foi irracional, não apenas ilógica.

O comportamento dele parecia absurdo e totalmente irracional.

A compra por impulso foi irracional.

How Formal Is It?

재미있는 사실

The concept of 'irrationality' has been a subject of philosophical and psychological debate for centuries, exploring the balance between human reason and emotion. In mathematics, 'números irracionais' (irrational numbers) are those that cannot be expressed as a simple fraction, like pi (π).

발음 가이드

UK /ˌɪr.a.siˈo.naw/
US /ˌɪr.ə.siˈo.næl/
The stress falls on the second to last syllable: ir-ra-ci-O-nal.
라임이 맞는 단어
emocional racional nacional internacional ocasional adicional tradicional funcional
자주 하는 실수
  • Pronouncing the 'rr' as a single 'r' sound.
  • Incorrect vowel sounds, especially the 'a' and 'o'.
  • Placing stress on the wrong syllable.

난이도

독해 3/5

The word 'irracional' is common in B1-level texts. Understanding its nuances might require B2-level comprehension, especially in complex contexts like psychology or economics. Texts discussing human behavior, decision-making, or emotional responses are likely to feature this word.

쓰기 3/5
말하기 3/5
듣기 3/5

다음에 무엇을 배울까

선수 학습

lógico razão emoção entender comportamento decisão

다음에 배울 것

irracionalidade racionalidade ilógico absurdo impulsivo

고급

vieses cognitivos psicologia comportamental falácia lógica determinismo

알아야 할 문법

Adjective Agreement

'Irracional' is invariable for gender. 'Um medo irracional' (masculine), 'uma reação irracional' (feminine). The plural is 'irracionais': 'sentimentos irracionais'.

Use of 'Ser' vs. 'Estar'

'Ser' is often used for inherent characteristics or judgments: 'Essa ideia é irracional.' (This idea is irrational.) 'Estar' can describe a temporary state: 'Ele está irracional hoje.' (He is acting irrationally today.)

Adverb Formation

The adverb 'irracionalmente' is formed by adding '-mente' to the adjective: 'Ele agiu irracionalmente.' (He acted irrationally.)

Prepositions with Fears

When talking about fears, use 'medo de'. 'Medo irracional de altura.' (Irrational fear of heights.)

Connecting Clauses

Use conjunctions like 'que' or 'o que' to link irrational actions/thoughts to their consequences: 'Sua decisão foi irracional, o que causou problemas.' (His decision was irrational, which caused problems.)

수준별 예문

1

Não é bom.

It is not good.

2

Ele é mau.

He is bad.

3

Isso não faz sentido.

This does not make sense.

4

A ideia é ruim.

The idea is bad.

5

Ela está triste.

She is sad.

6

O plano é louco.

The plan is crazy.

7

Ele age sem pensar.

He acts without thinking.

8

Não é lógico.

It is not logical.

1

Essa decisão parece irracional.

This decision seems irrational.

'irracional' is used here to describe a decision that lacks good reasoning.

2

Seu medo de altura é irracional.

Your fear of heights is irrational.

'irracional' describes a fear that is not based on a real danger.

3

Ele teve uma reação irracional.

He had an irrational reaction.

'irracional' characterizes a reaction that is disproportionate to the situation.

4

Não consigo entender seu comportamento irracional.

I can't understand his irrational behavior.

'irracional' modifies 'comportamento' (behavior) to indicate it lacks logic.

5

Essa ideia é completamente irracional.

This idea is completely irrational.

'irracional' is used to describe an idea that is not based on reason.

6

Ele age de forma irracional às vezes.

He acts in an irrational way sometimes.

'irracional' describes the manner of acting.

7

É um medo irracional de aranhas.

It is an irrational fear of spiders.

'irracional' modifies 'medo' (fear).

8

O plano deles era irracional.

Their plan was irrational.

'irracional' describes the nature of the plan.

1

A decisão de investir todo o dinheiro foi irracional.

The decision to invest all the money was irrational.

'irracional' is used to judge a financial decision as lacking sound reasoning.

2

Seu pânico em situações sociais é irracional.

Her panic in social situations is irrational.

'irracional' describes the intensity or nature of the panic.

3

É difícil aceitar um argumento irracional.

It is difficult to accept an irrational argument.

'irracional' modifies 'argumento' (argument) to indicate it lacks logical basis.

4

O comportamento dele durante a crise foi irracional.

His behavior during the crisis was irrational.

'irracional' describes the behavior during a stressful event.

5

Não há justificativa racional para tal ação irracional.

There is no rational justification for such an irrational action.

Here, 'irracional' is used to describe an action that lacks logical justification.

6

As crenças irracionais podem causar sofrimento.

Irrational beliefs can cause suffering.

'irracionais' modifies 'crenças' (beliefs).

7

A resposta dele foi desproporcional e irracional.

His response was disproportionate and irrational.

'irracional' is used alongside 'desproporcional' to describe the response.

8

Essa superstição é irracional, mas comum.

This superstition is irrational, but common.

'irracional' describes the nature of the superstition.

1

Apesar das evidências, ele manteve sua crença irracional.

Despite the evidence, he maintained his irrational belief.

'irracional' describes a belief that persists despite logical contradictions.

2

O pânico generalizado foi uma reação irracional à notícia.

The widespread panic was an irrational reaction to the news.

'irracional' characterizes a collective emotional response that lacks a sound basis.

3

É difícil debater com alguém cujos argumentos são puramente irracionais.

It is difficult to debate with someone whose arguments are purely irrational.

'irracionais' describes arguments that lack logical coherence or factual support.

4

A economia pode ser afetada por decisões irracionais dos consumidores.

The economy can be affected by irrational consumer decisions.

'irracionais' modifies 'decisões' (decisions) in an economic context.

5

Ele lutava contra pensamentos irracionais que o atormentavam.

He fought against irrational thoughts that tormented him.

'irracionais' describes thoughts that are illogical and disturbing.

6

A teoria por trás do experimento parecia irracional para muitos cientistas.

The theory behind the experiment seemed irrational to many scientists.

'irracional' is used in a scientific context to question a theory's logic.

7

O medo irracional de voar impede muitas pessoas de viajar.

The irrational fear of flying prevents many people from traveling.

'irracional' modifies 'medo' (fear) indicating it's not based on actual risk.

8

Sua lealdade cega era vista como irracional por seus colegas.

His blind loyalty was seen as irrational by his colleagues.

'irracional' describes the nature of the loyalty.

1

As motivações por trás de suas ações extremas eram profundamente irracionais.

The motivations behind his extreme actions were profoundly irrational.

'irracionais' describes complex motivations underlying extreme behavior.

2

A ascensão de movimentos irracionais na sociedade é um sinal preocupante.

The rise of irrational movements in society is a worrying sign.

'irracionais' characterizes social or political movements lacking logical foundation.

3

É um erro julgar sentimentos complexos como meramente irracionais.

It is a mistake to judge complex feelings as merely irrational.

'irracionais' is used in a nuanced discussion about emotions, cautioning against simplistic labels.

4

A economia comportamental estuda como vieses cognitivos levam a decisões irracionais.

Behavioral economics studies how cognitive biases lead to irrational decisions.

'irracionais' is used in an academic context to describe decision-making flaws.

5

Ele tentava desconstruir a lógica irracional por trás de sua própria ansiedade.

He tried to deconstruct the irrational logic behind his own anxiety.

'irracional' is used to describe the flawed reasoning contributing to a psychological state.

6

A arte surrealista frequentemente explora o reino do irracional.

Surrealist art often explores the realm of the irrational.

'irracional' describes a domain or realm explored in art.

7

A manipulação de massas pode explorar o lado irracional das pessoas.

The manipulation of masses can exploit the irrational side of people.

'irracional' refers to a human tendency that can be exploited.

8

Sua argumentação, embora apaixonada, carecia de base factual, tornando-a irracional.

His argumentation, although passionate, lacked factual basis, making it irrational.

'irracional' is used as a conclusion based on a lack of factual support.

1

A complexidade da psique humana permite manifestações de irracionalidade em níveis profundos.

The complexity of the human psyche allows for manifestations of irrationality at deep levels.

'irracionalidade' (noun form) is used to discuss the abstract concept of irrationality.

2

A história está repleta de exemplos de decisões políticas irracionais com consequências devastadoras.

History is replete with examples of irrational political decisions with devastating consequences.

'irracionais' describes political decisions with far-reaching negative impacts.

3

É um desafio distinguir entre intuição genuína e delírios irracionais.

It is a challenge to distinguish between genuine intuition and irrational delusions.

'irracionais' modifies 'delírios' (delusions), highlighting their lack of grounding.

4

A arte moderna frequentemente questiona a própria definição de racionalidade, abraçando o irracional.

Modern art often questions the very definition of rationality, embracing the irrational.

'o irracional' (the irrational) is used as a noun phrase referring to the concept itself.

5

A propagação de desinformação em larga escala explora a suscetibilidade humana ao irracional.

The spread of large-scale disinformation exploits human susceptibility to the irrational.

'o irracional' (the irrational) is used as a noun to describe a human tendency.

6

O estudo do comportamento irracional é fundamental para a compreensão das dinâmicas sociais.

The study of irrational behavior is fundamental to understanding social dynamics.

'irracional' modifies 'comportamento' (behavior) in an academic context.

7

A busca por um sentido último pode, por vezes, levar a conclusões irracionais.

The search for ultimate meaning can, at times, lead to irrational conclusions.

'irracionais' describes conclusions that deviate from logical reasoning.

8

A própria natureza da fé pode, para alguns, residir no domínio do irracional.

The very nature of faith can, for some, reside in the domain of the irrational.

'do irracional' (of the irrational) is used to denote a realm or domain.

동의어

ilógico sem sentido absurdo descabido descabido desatinado impulsivo emocional

반의어

racional lógico sensato coerente

자주 쓰는 조합

comportamento irracional
decisão irracional
medo irracional
pensamento irracional
reação irracional
argumento irracional
crença irracional
sentimento irracional
impulso irracional
poder irracional

자주 쓰는 구문

Completamente irracional

— Entirely lacking logic or reason.

A ideia de que o sol gira em torno da Terra é completamente irracional.

Um pouco irracional

— Slightly lacking in logic or reason.

A compra foi um pouco irracional, mas ele gostou.

Nada irracional

— Not at all irrational; perfectly reasonable.

O medo dele é compreensível, nada irracional.

Atitude irracional

— Behavior or stance that is not based on logic.

Sua atitude irracional prejudicou a negociação.

Falar irracional

— To speak in a way that is illogical or nonsensical.

Depois de algumas bebidas, ele começou a falar irracional.

Agir irracional

— To behave in a way that lacks reason or logic.

É perigoso agir irracional em situações de estresse.

Comportamento irracional

— Actions that are not based on sound judgment.

O comportamento irracional do torcedor foi criticado.

Medo irracional

— A fear that is not based on a logical threat.

O medo irracional de palhaços é comum em crianças.

Decisão irracional

— A choice made without proper reasoning.

A decisão irracional de demitir funcionários experientes foi um erro.

Pensamento irracional

— A thought process that is not based on logic.

Ter pensamentos irracionais pode afetar a saúde mental.

자주 혼동되는 단어

irracional vs Ilógico

'Ilógico' focuses on a flaw in reasoning, while 'irracional' often implies an emotional or impulsive basis for the lack of logic. Something can be ilógico due to a mistake in calculation, but irrational often suggests a deeper, perhaps emotional, detachment from reason.

irracional vs Absurdo

'Absurdo' emphasizes ridiculousness or nonsensical nature, often to an extreme degree. An irrational act can be absurd, but 'absurdo' highlights the comical or unbelievable aspect, whereas 'irracional' points to the lack of a rational foundation.

irracional vs Sem sentido

'Sem sentido' is a broader term for senseless or meaningless. 'Irracional' specifically refers to the lack of rational thought processes or logical justification.

혼동하기 쉬운

irracional vs Ilógico

Both words describe a departure from reason or logic.

While 'irracional' often suggests a drive by emotion or impulse, 'ilógico' simply points to a flaw in the reasoning process itself. An argument can be 'ilógico' if its steps don't follow correctly, whereas a sudden, emotional outburst might be 'irracional'.

A matemática pode ser ilógica se houver um erro; uma reação de raiva descontrolada é irracional.

irracional vs Absurdo

Irrational actions can often appear absurd.

'Absurdo' emphasizes the ridiculousness or nonsensical nature of something, often to the point of being unbelievable or comical. 'Irracional' focuses more specifically on the lack of logical foundation or rational thought.

É absurdo pensar que vai chover dentro de casa, mas o medo de chuva dele é irracional.

irracional vs Sem sentido

Both terms indicate a lack of logic or coherence.

'Sem sentido' is a general term for something meaningless, pointless, or nonsensical. 'Irracional' is more specific to a lack of rational thought processes, often implying an emotional or psychological component.

Falar sozinho é sem sentido; comprar algo sem precisar é irracional.

irracional vs Impulsivo

Impulsive actions are frequently irrational.

'Impulsivo' describes acting on sudden urges without much thought, which is a *cause* of irrational behavior. 'Irracional' describes the behavior itself as lacking reason.

Sua compra impulsiva foi uma decisão irracional.

irracional vs Emocional

Strong emotions can lead to irrational actions.

'Emocional' describes something driven by feelings. While emotions can lead to irrationality, 'emocional' itself doesn't necessarily mean lacking logic; it just means feeling-driven. 'Irracional' specifically highlights the lack of logic.

A resposta emocional dele foi exagerada e, portanto, irracional.

문장 패턴

A2

Noun + é/foi + irracional.

Essa ideia é irracional.

A2

Ele/Ela + agiu + de forma + irracional.

Ele agiu de forma irracional.

B1

Seu/Sua + [noun related to feeling/action] + é/foi + irracional.

Seu medo é irracional.

B1

É + [noun] + irracional.

É uma decisão irracional.

B2

Apesar de + [condition], o/a + [noun] + foi + irracional.

Apesar das evidências, a decisão foi irracional.

B2

O/A + [noun] + é/foi + [adjective] + e + irracional.

A resposta foi exagerada e irracional.

C1

As + [plural noun] + por trás de + [noun/action] + eram + irracionais.

As motivações por trás de suas ações eram irracionais.

C1

O/A + [noun] + explora + o + lado + irracional + das + [people].

A propaganda explora o lado irracional das pessoas.

어휘 가족

명사

irracionalidade

형용사

irracional

관련

racional
lógico
razão
emoção
comportamento

사용법

frequency

Medium-High (Common in everyday conversation, media, and academic contexts)

자주 하는 실수
  • Trying to change the gender of 'irracional'. A decisão foi irracional.

    'Irracional' is invariable for gender. It remains 'irracional' whether modifying a masculine or feminine noun. The plural form is 'irracionais'.

  • Using 'irracional' when 'ilógico' or 'absurdo' would be more precise. O argumento dele é ilógico.

    While related, 'ilógico' specifically refers to a flaw in reasoning, and 'absurdo' implies ridiculousness. 'Irracional' often implies an emotional or impulsive driver.

  • Confusing 'irracional' with 'sem sentido' (senseless). Essa ação é sem sentido.

    'Sem sentido' means meaningless or pointless, while 'irracional' specifically refers to a lack of rational thought processes.

  • Overusing 'irracional' to dismiss any opinion one disagrees with. Não concordo com a sua opinião.

    Labeling everything you disagree with as 'irracional' can be dismissive. Use it only when there is a genuine lack of logic or reason involved.

  • Not using the plural form 'irracionais' when needed. Os medos dele são irracionais.

    When referring to multiple irrational things (e.g., fears, decisions, thoughts), the adjective must be in the plural form: 'irracionais'.

Adjective Agreement

Always remember that 'irracional' does not change for gender (masculine/feminine). The only change is to the plural form: 'irracionais'. For example, 'um medo irracional' and 'uma ideia irracional' both use 'irracional', while 'medos irracionais' and 'ideias irracionais' use the plural form.

Synonym Exploration

Expand your vocabulary by learning related words like 'ilógico', 'absurdo', and 'sem sentido'. Understanding their subtle differences will allow you to express yourself with more precision.

Stress and Vowels

Focus on placing the stress correctly on the second-to-last syllable ('-ci-O-nal') and practicing the open vowel sounds. Listening to native speakers pronounce 'irracional' can greatly improve your own pronunciation.

Visual Mnemonics

Create vivid mental images associating 'irracional' with illogical actions or emotions. For instance, picture someone making a completely nonsensical choice, like trying to fly by flapping their arms. This visual link can make the word more memorable.

Sentence Building

Actively construct sentences using 'irracional' in different contexts. Try describing personal experiences, hypothetical situations, or observations about the world around you. The more you practice, the more natural it will feel.

Cultural Nuance

Be aware that labeling something as 'irracional' can sometimes be dismissive. Consider the sensitivity of the situation and the potential impact of your words, especially when discussing someone's emotions or beliefs.

Connect to English

The Portuguese word 'irracional' is very similar to the English 'irrational'. Recognize this cognate relationship to quickly grasp the core meaning and build confidence in using the word.

Use in Conversation

Don't be afraid to use 'irracional' in your conversations. Start with simpler sentences and gradually incorporate it into more complex expressions as you become more comfortable. Native speakers will appreciate your effort.

Regular Revision

Periodically review the definition, synonyms, and example sentences for 'irracional'. Consistent revision will help solidify the word in your long-term memory and ensure you can recall and use it appropriately.

암기하기

기억법

Imagine someone acting completely out of character, making bizarre choices. They are so far from sensible, their actions are 'ir-RA-ci-o-nal' – like they've lost their 'RA' (reason). Think of an 'RA' (Resident Advisor) who is supposed to be rational, but this person is the opposite.

시각적 연상

Picture a brain that is tangled and knotted, with question marks floating around it, symbolizing a lack of clear, logical thought. Or, imagine a person throwing a perfectly good apple away because they suddenly decided they hate apples without any real reason.

Word Web

Logic Reason Emotion Impulse Behavior Decision Fear Thought Sense Judgment

챌린지

Try to describe a time you witnessed or experienced something that felt irrational. Was it a personal feeling, someone else's action, or a societal trend? Use the word 'irracional' and its synonyms to articulate the situation.

어원

The word 'irracional' comes from the Latin word 'irrationalis', which is formed by the prefix 'in-' (meaning 'not') and 'rationalis' (meaning 'rational' or 'reasonable'). This prefix 'in-' negates the meaning of the root word.

원래 의미: Not rational; not according to reason.

Indo-European > Italic > Latin > Romance > Portuguese

문화적 맥락

While 'irracional' is a descriptive term, it can sometimes be used dismissively. It's important to be sensitive when applying it to people's emotions or beliefs, as what seems irrational to one person might be deeply felt or have a complex origin for another. Context and intent are crucial.

The English word 'irrational' carries very similar connotations and usage patterns. It is also used to describe actions, thoughts, or emotions that lack logic or reason, often driven by strong feelings.

The concept of the 'irrational' is central to many works of literature and philosophy, exploring the darker or less logical aspects of human nature. For example, in existentialist thought, the absurd and the irrational are often contrasted with the search for meaning. In psychology, 'irrational beliefs' are a key concept in Cognitive Behavioral Therapy (CBT), where therapists help patients identify and challenge thoughts that are illogical and lead to distress. The term is also used in economics, particularly in behavioral economics, to explain why people sometimes make financial decisions that are not in their best interest, deviating from purely rational models.

실생활에서 연습하기

실제 사용 상황

Discussing personal feelings or phobias.

  • Tenho um medo irracional de...
  • É uma reação irracional, eu sei.
  • Não consigo explicar por que sinto isso, é irracional.

Analyzing someone's actions or decisions.

  • Essa decisão foi irracional.
  • O comportamento dele é irracional.
  • Agir de forma irracional não ajuda.

Critiquing arguments or ideas.

  • O argumento é irracional.
  • Essa ideia é completamente irracional.
  • Não há base racional para isso, é irracional.

Talking about psychological states.

  • Pensamentos irracionais podem ser prejudiciais.
  • Lidar com o irracional é um desafio.
  • A fonte do problema é irracional.

Describing societal trends or events.

  • O pânico coletivo foi irracional.
  • Movimentos irracionais ganharam força.
  • É um reflexo do irracional na sociedade.

대화 시작하기

"Have you ever done something that you later realized was completely irrational?"

"What do you think drives irrational behavior in people?"

"Can you give an example of an irrational decision you've seen someone make?"

"Is it ever okay to act irrationally?"

"How can we distinguish between a gut feeling and an irrational impulse?"

일기 주제

Describe a time you felt overwhelmed by an emotion and acted in a way that felt irrational afterwards. What was the situation, and what did you learn?

Think about a fear you have. Do you believe it is rational or irrational? Explain why.

Consider a decision you made that seemed logical at the time but turned out to be a mistake. Was there an irrational element you overlooked?

Reflect on a time you observed someone else acting irrationally. What was your reaction, and what might have been the underlying reasons for their behavior?

How important is rationality in everyday life? Can you think of situations where irrationality might be beneficial or understandable?

자주 묻는 질문

10 질문

Generally, 'irracional' carries a negative connotation because it implies a lack of good judgment or sensible reasoning. However, in certain contexts, like discussing abstract art or certain philosophical concepts, it might be used more neutrally to describe something that transcends logic. But in everyday language, it's usually a critique.

The stress is on the second to last syllable: ir-ra-ci-O-nal. The 'rr' sound is a slightly rolled 'r' or a flap, similar to the 'tt' in the American English word 'butter'. The vowels are generally open sounds.

'Ilógico' means illogical, focusing on a flaw in the reasoning process. 'Irracional' often implies that the behavior or thought is driven by emotion or impulse rather than a simple logical error. For example, a mathematical error makes a proof 'ilógico', while a panic attack is considered 'irracional'.

Yes, absolutely. You can describe decisions, actions, ideas, beliefs, fears, arguments, or even behaviors as 'irracional'. For instance, 'uma decisão irracional' (an irrational decision) or 'um medo irracional' (an irrational fear).

Yes, the noun form is 'irracionalidade', which means 'irrationality'. For example, 'A irracionalidade humana é um campo de estudo complexo.' (Human irrationality is a complex field of study.)

'Irracionalmente' is the adverb form. You use it to describe how an action was performed. For example: 'Ele agiu irracionalmente.' (He acted irrationally.) It modifies a verb.

No, 'irracional' is invariable for gender. It is the same for masculine and feminine nouns. The plural form is 'irracionais'.

Sometimes, yes. If someone does something slightly silly or quirky that isn't harmful, you might jokingly call it 'um pouco irracional'. However, the core meaning is still about a lack of logic, so it depends heavily on tone and context.

The most direct opposite is 'racional' (rational). Other opposites include 'lógico' (logical) and 'sensato' (sensible).

'Irracional' is a fairly common word in Portuguese, especially in discussions about human behavior, psychology, decision-making, and everyday life. You'll encounter it frequently in news, books, and conversations.

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