The antonyms for the word "bad-tempered" are words that describe a person's temperament as being positive, kind, and cheerful. Some of these antonyms include "calm", "peaceful", "composed", "amiable", "affable", "good-humored", "pleasant", "good-natured", "charming", "agreeable", "friendly", "serene", "sweet-tempered", "benevolent", "gracious" and "courteous". These words convey an attitude that is almost the opposite of bad-temperedness. If you want to describe someone who is easygoing, happy, and positive, you can choose one of these antonyms instead of "bad-tempered".