irrational
Translation
irrational, unreasonable, illogical
Examples
His fear of spiders is completely irrational.
His fear of spiders is completely irrational.
She made an irrational decision to quit her job.
She made an irrational decision to quit her job.
Grammar Patterns
((sth.)) is irrational to be not based on reason His fear of spiders is completely irrational.
an irrational ((noun)) an ((adjective)) not based on reason She made an irrational decision.
Similar Words
Synonyms: unreasonable, illogical, absurd; Antonyms: rational, logical, reasonable
Etymology
From the prefix 'ir-' (not) + 'rational' (based on reason). Literally 'not based on reason'.
Memory Tips
Think of 'ir-' as meaning 'not'. So, 'not rational'. Imagine someone irrationally arguing with a robot.