Choleric
Etymology
From the old physiology of the four humors, in which "choler" — yellow bile — was one of the body’s governing fluids, from Greek kholē, "bile." An excess of choler was thought to make a person hot, dry, and quick to rage. The medicine is long gone, but choleric still names exactly that fiery, irascible temperament.
adjective · /KOL-ur-ik/
Bad-tempered and quick to anger.
What it names
The hair-trigger irritability of someone whose temper flares hot and fast at the smallest provocation.
Example
The choleric chef hurled a pan across the kitchen when the sauce broke for the second time.
Related idea
Irascible and choleric both mean quick to anger; choleric carries the old humoral flavor of a fixed, fiery constitution rather than a mere tendency.