boulder

Pick up one of those rocks, get behind the boulder.

Prends un de ces cailloux et mets-toi derrière le gros rocher.

— The Princess Bride (1987)

That is a nice boulder.

C’est un joli rocher.

— Shrek (2001)

I like that boulder.

J’aime ce rocher.

— Shrek (2001)

It's smaller than a boulder and larger than a pebble.

C’est plus petit qu’un rocher et plus gros qu’un caillou.