Ill-tempered, a.
1. Of bad temper; morose; crabbed; sour; peevish; fretful; quarrelsome.
2. Unhealthy; ill-conditioned. [Obs.] So ill-tempered I am grown, that I am afraid I shall catch cold, while all the world is afraid to melt away. Pepys.
Shades of meaning
Fernald lists ill-tempered only as an antonym, under amiable.
He lists it without comment; the entries above explain its neighbors.
Synonyms
none given