V2 Vocabulary Building Dictionary
irrational
adjective
Definition: 1. lacking in reason or logic; 2. not thinking clearly
Synonyms: unreasonable, illogical, foolish, inane, absurd, nonsensical
Antonyms: reasonable, logical
Tips: The word rational means "reasonable." Adding the prefix ir- makes it negative, thus, "without reason."
Usage Examples:
Running away from home when things don't go your way is irrational. (foolish, unreasonable)
It would be irrational to quit this project after we've put so much time into it. (absurd, unreasonable)
She had a lot of ideas, some irrational, some pretty reasonable. (illogical, nonsensical)
You've had too much to drink and your thinking is irrational right now. (illogical, inane)
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