adjective

silly

silly, foolish, daft

That was a silly mistake to make.

That was a silly mistake to make.

Don't be silly, of course I can help.

Don't be silly, of course I can help.

He made a silly face to make the baby laugh.

He made a silly face to make the baby laugh.

((adjective)) having or showing a lack of common sense or judgment. It was a silly thing to say.

((to be)) silly to behave in a foolish or playful way. Stop being silly and listen to me.

Synonyms: foolish, goofy, absurd; Antonyms: serious, sensible, wise

From Middle English 'sely' meaning 'happy, blessed', which evolved to 'innocent' and then 'foolish'.

Imagine someone wearing a 'silly' hat with a propeller on top. It's often used in a light-hearted, not truly insulting, way.

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