The word "even-tempered" refers to a person who remains calm and levelheaded in any situation. Synonyms for this word can include "calm," "composed," "collected," "cool," "serene," "equable," "stable," "tranquil," "mild," and "balanced." Other synonyms may be "unflappable," "poised," "patient," "steady," and "unruffled." These words all convey the same sense of a person who is not easily unnerved or swayed by emotions, and who remains calm and collected even in challenging or difficult circumstances. Whether used in personal or professional situations, an even-tempered personality is highly valued and respected by others.