• a person's state of mind seen in terms of their being angry or calm

Synonyms: temperament, disposition, nature, character, personality, make-up, constitution, mind, spirit, stamp, mettle, mould

• the degree of hardness and elasticity in steel or other metal

• improve the hardness and elasticity of (steel or other metal) by reheating and then cooling it

• act as a neutralizing or counterbalancing force to (something)

Synonyms: moderate, modify, modulate

• tune (a piano or other instrument) so as to adjust the note intervals correctly