Unpleasant means disagreeable, uncomfortable, or causing discomfort. When something is unpleasant, you don't enjoy it and might actively dislike it. An unpleasant smell makes you wrinkle your nose. An unpleasant task is something you'd rather not do, like cleaning out a moldy lunchbox you forgot about. An unpleasant person treats others rudely or unkindly, making people want to avoid them.

The word covers a wide range of negative experiences. A doctor's appointment might be unpleasant but necessary. Bad weather can make a camping trip unpleasant. Sometimes unpleasant describes mild annoyances, like itchy clothing or a boring lecture. Other times it describes genuinely difficult situations, like an unpleasant conversation where you have to admit you made a mistake and broke something valuable.

Notice that unpleasant is milder than words like terrible or horrible. It describes things that bother you without being catastrophic. The opposite of unpleasant is pleasant, which describes things that are agreeable and enjoyable.