irrationally

Definitions

In a manner not governed by or according to reason.

In a way that is illogical, absurd, or contrary to sound judgment.

Examples

He reacted irrationally when he heard the unexpected news.

It is easy to act irrationally when you are feeling overwhelmed by stress.

She was afraid of spiders and would often scream irrationally whenever she saw one.

Synonyms

illogically unreasonably absurdly foolishly senselessly erratically unthinkingly

Antonyms

logically reasonably rationally sensibly wisely coherently judiciously