Temper

a sudden outburst of anger

a characteristic (habitual or relatively temporary) state of feeling

a disposition to exhibit uncontrolled anger

the elasticity and hardness of a metal object

bring to a desired consistency, texture, or hardness by a process of gradually heating and cooling

harden by reheating and cooling in oil

adjust the pitch (of pianos)

make more temperate, acceptable, or suitable by adding something else

change by restraining or moderating