He is fouldering on the rock wall.

The lightning fouldered across the sky.

The foulage of grapes is an important step in winemaking.

The foulants on the surface of the pipe were causing a decrease in flow rate.

The foulsmelling odor filled the room.

He fouleth the ground with his feet.

The foulmouths in the crowd were shouting obscenities.

The smell coming from the garbage can was foulish.

He used a foulish strategy in the game.

He is known for being a foulmouth.