temperamental

adjective

1 a temperamental chef:

volatile, excitable, emotional, overemotional, mercurial, capricious, erratic, unpredictable, changeable, inconsistent, unstable, hot-headed, fiery, explosive, hot-tempered, short-tempered, quick-tempered, irritable, irascible, impatient, petulant, prima donna-ish, melodramatic;

touchy, moody, sensitive, oversensitive, hypersensitive, highly strung, neurotic, easily upset;

informal on a short fuse.

▷antonyms calm, placid, phlegmatic.

2 he had a temperamental dislike of all conflict:

inherent, innate, natural, inborn, constitutional, deep-rooted, ingrained, congenital.

temperamental Oxford Dictionary of English