This is the 4142nd most frequent French word.
couler
To flow or to sink.
Couler is used here to convey the idea of a liquid moving downward due to gravity.
La peinture a commencé à couler sur le mur.
The paint started to drip on the wall.
Couler is employed here to indicate the act of submergence of a vessel in water.
Le bateau coule après avoir frappé un rocher.
The ship is sinking after hitting a rock.
Couler is used here to describe the smooth and continuous flow of the water.