The Latin word temperāre, meaning “to make mild,”“to control,” or “to soften,” gives us the root temper. Words from the Latin temperāre have something to do with mildness or control. To temper is to soften or make something less strong or difficult. Someone temperamental has little control over her or his mood and reactions to people and events. Temperature, or the degree of hotness or coldness, tells whether something is mild, too hot, or too cold.
nountem·per·ance \ˈtem-p(ə-)rən(t)s, -pərn(t)s\
Medical Definition of TEMPERANCE
: habitual moderation in the indulgence of the appetites or passions; specifically: moderation in or abstinence from the use of alcoholic beverages