adjective

foolish

unwise, silly, stupid

It was a foolish thing to say.

It was a foolish thing to say.

I felt foolish when I realised my mistake.

I felt foolish when I realized my mistake.

a foolish ((noun)) an unwise (noun) It was a foolish decision.

It is foolish ((of sb.)) ((to-inf)) It is unwise for (sb.) to do (sth.) It was foolish of him to quit his job.

Synonyms: silly, unwise, stupid, absurd; Antonyms: wise, sensible, clever

From 'fool' plus the suffix '-ish', meaning 'having the qualities of'.

Remember that something a 'fool' would do is 'foolish'.

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