faul in English:

He uses foul language whenever he gets angry.

We must get rid of this foul garbage right away.

The police found no signs of foul play in the apartment.

He called the ball foul.

There's a foul smell in the kitchen.

No love is foul nor prison fair.

They should never play foul.

You have foul breath.

It's foul of you to have concealed it.

The air in this room is foul.

I just opened the lid, and a foul smell filled my nose.

The peacock has fair feathers but foul feet.