temper

a sudden outburst of anger; "his temper sparked like damp firewood"

a characteristic (habitual or relatively temporary) state of feeling; "whether he praised or cursed me depended on his temper at the time"; "he was in a bad humor"

a disposition to exhibit uncontrolled anger; "his temper was well known to all his employees"

the elasticity and hardness of a metal object; its ability to absorb considerable energy before cracking

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

harden by reheating and cooling in oil; "temper steel"

adjust the pitch (of pianos)

make more temperate, acceptable, or suitable by adding something else; moderate; "she tempered her criticism"

restrain