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irrational

adjective
/ɪˈræʃənəl/

Meaning

not logical or reasonable; lacking clear thought

Example Sentences

His fear of the dark was completely irrational.

Example Expressions

irrational fear

Synonyms

illogical, unreasonable, absurd, senseless

Antonyms

rational, logical, reasonable

Collocations

irrational decision, irrational behavior, irrational belief

Related Vocabularies

respected and admired; held in high regard
friendly and welcoming to strangers or guests; generous in receiving guests
Representing the most typical or perfect example of a quality or class.
Not able to be seen through; not transparent; difficult to understand.
Similar or uniform in nature; often used interchangeably with 'homogeneous'.
cruel; not nice or caring toward others

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