unreason
C2/LowFormal, Literary, Academic
Definition
Meaning
Lack of reason, rationality, or good sense; irrational or absurd thought or behaviour.
Chaos or disorder resulting from a lack of reason; a state of madness or delirium; can also refer to the faculty of the unconscious or the irrational in literature.
Linguistics
Semantic Notes
Often used abstractly to denote a state or quality, rather than a specific act. Carries a negative, sometimes archaic or poetic connotation.
Dialectal Variation
British vs American Usage
Differences
No significant differences in meaning or usage. Slightly more common in British literary and philosophical contexts.
Connotations
Equally strong connotations of folly, chaos, and the breakdown of logical order in both varieties.
Frequency
Rare in everyday speech in both regions; found primarily in formal writing, criticism, and historical texts.
Vocabulary
Collocations
Grammar
Valency Patterns
[the] unreason of + [noun phrase] (the unreason of the mob)[verb] into unreason (slip into unreason)[preposition] + unreason (a triumph of unreason)Vocabulary
Synonyms
Strong
Neutral
Weak
Vocabulary
Antonyms
Phrases
Idioms & Phrases
- “the age of unreason”
- “a season of unreason”
- “triumph of unreason over reason”
Usage
Context Usage
Business
Extremely rare. Potentially used metaphorically in critiques of market panics or irrational decision-making.
Academic
Used in philosophy, literary criticism, history, and political theory to discuss anti-enlightenment thought, mob psychology, or irrational forces.
Everyday
Virtually never used in casual conversation.
Technical
Not a technical term in STEM fields.
Examples
By Part of Speech
verb
British English
- N/A
American English
- N/A
adverb
British English
- N/A
American English
- N/A
adjective
British English
- The unreasoning fury of the crowd was terrifying.
American English
- He made an unreasoning decision based on pure fear.
Examples
By CEFR Level
- Unreason is a difficult word. It means no reason.
- In the story, the king's unreason led to many bad decisions.
- The political debate quickly descended into unreason, with both sides shouting illogical claims.
- The novelist explored the dark unreason lurking beneath the surface of civilised society.
Learning
Memory Aids
Mnemonic
UN + REASON. Think of a situation where REASON has been removed (UN-done), leaving only chaos and illogic behind.
Conceptual Metaphor
UNREASON IS A FORCE/DARKNESS (the forces of unreason descended; the dark unreason of the crowd).
Watch out
Common Pitfalls
Translation Traps (for Russian speakers)
- Avoid directly translating as "неразумность" (lack of wisdom) or "безрассудство" (recklessness). The closest concept is "безумие" (madness) or "иррациональность" (irrationality) in an abstract sense.
Common Mistakes
- Using it as a verb (e.g., 'He unreasoned the argument' is incorrect). Treating it as a countable noun (e.g., 'an unreason') is very rare and poetic.
Practice
Quiz
Which of the following is the BEST synonym for 'unreason' in a literary context?
FAQ
Frequently Asked Questions
No, it is a rare, formal word primarily used in academic or literary writing.
No. The related adjective is 'unreasoning' and the verb is 'to reason'.
'Unreason' is an abstract state of lacking reason. 'Nonsense' refers to specific spoken or written words that are silly or meaningless.
Almost always negative. In some Romantic or psychoanalytic contexts, it might neutrally describe the non-rational mind, but it still implies a departure from logic.
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