in·tem·per·ate (ĭn-těm'pər-ĭt, -prĭt) adj. Not temperate or moderate; excessive, especially in the use of alcoholic beverages. in·tem'per·ate·ly adv., in·tem'per·ate·ness n.
"characterized by excessive indulgence in a passion or appetite," c.1430, from L. intemperatus "untempered, inclement, immoderate," from in- "not" + temperantia (see temperance).