noun

whistle

whistle, pipe

The referee blew his whistle.

The referee blew his whistle.

I heard a loud whistle from the train.

I heard a loud whistle from the train.

a whistle The referee blew his whistle.

Synonyms: pipe, siren, hoot

From Old English 'hwistlian' (to whistle), considered onomatopoeic.

Picture a referee's whistle used to stop a game. The sound is a 'whistle'.

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