Ill-tempered is an adjective used to describe someone who is easily annoyed or angry. The opposite of ill-tempered is good-natured, which means a person who is kind and friendly towards others. Other antonyms for ill-tempered could be calm, patient, gentle, and amiable. These are traits of people who are pleasant, composed and have a cheerful disposition. For example, a calm person is someone who is tranquil and peaceful in behavior, and patient ones are those who are capable to endure any task and situation without becoming frustrated or irritated. The antonyms of ill-tempered make it clear that being kind and friendly is the ideal behavior that everyone should aspire to.