temper

A sudden outburst of anger.

“his temper sparked like damp firewood”

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

A disposition to exhibit uncontrolled anger.

“his temper was well known to all his employees”

A characteristic (habitual or relatively temporary) state of feeling.

“whether he praised or cursed me depended on his temper at the time”

Make more temperate, acceptable, or suitable by adding something else.

“she tempered her criticism”

Harden by reheating and cooling in oil.

“temper steel”

Change by restraining or moderating.

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

“temper glass”

Adjust the pitch (of pianos).