caillou
pebble, small stone
noun kah-YOO Rare
Origin: Gaulish origin, related to Breton kailhoù
Usage Note
Caillou is notable for its irregular plural cailloux (like genou → genoux). It is also widely recognized as the French name of the character Caillou, a Canadian children's TV show. In slang, caillou can mean 'head' or a bald head.
Examples
"L'enfant a ramassé un caillou sur la plage."
Natural Translation
The child picked up a pebble on the beach.

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