How do you spell Attemper

Available Definitions:
1)  v. t. - To reduce, modify, or moderate, by mixture; to temper; to regulate, as temperature.
2)  v. t. - To soften, mollify, or moderate; to soothe; to temper; as, to attemper rigid justice with clemency.
3)  v. t. - To mix in just proportion; to regulate; as, a mind well attempered with kindness and justice.
4)  v. t. - To accommodate; to make suitable; to adapt.