Translation

ひどく不快な / 汚い / 悪臭のする / 下品な

Meaning

Foul means very unpleasant, dirty, or offensive, especially a foul smell, foul language, foul weather, or foul water. The learner trap is fowl: fowl means a bird, especially one kept or hunted for food.

Examples

• 台所からひどい悪臭がしました。
  A foul smell came from the kitchen.
• 先生は授業中の下品な言葉を許しませんでした。
  The teacher did not allow foul language in class.