1The company was accused of foul play in the bidding process for the government contract.
2Was the foul odor from the nearby factory causing health problems for local residents?
3The referee called a foul on the player for tripping an opponent during the match.
4The discovery of the foul language in the ancient text shed new light on the culture of the time.
5There is a growing concern about the foul impact of pollution on the environment and human health.