adjective

dumb

stupid, silly, mute

That was a dumb mistake to make.

That was a stupid mistake to make.

He played dumb when asked about the broken vase.

He played dumb when asked about the broken vase.

a dumb ((noun)) a stupid (noun) That was a dumb question.

to be dumb to be stupid Don't be so dumb.

Synonyms: stupid, foolish, unintelligent; Antonyms: smart, intelligent, clever

From Old English 'dumb', meaning 'silent, speechless'. The meaning shifted to 'stupid' due to the mistaken belief that being unable to speak indicated a lack of intelligence.

Imagine being 'struck dumb' (unable to speak) by surprise. The vacant expression might look 'dumb' or foolish. Note: calling a person 'dumb' is very offensive.

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