Foul

The falconer used a leather glove to handle the foul during hunting expeditions.

The foul rag that he used to clean the car only made it dirtier.

The foul air inside the factory required employees to wear masks.

The car's engine started running foul, causing it to sputter and stall.

The fisherman cast his foul into the water and waited patiently for a bite.

The foul smoke from the burning forest obscured the sun and created a gloomy atmosphere.