immoderate (adj.)

"excessive, extreme, lacking moderation," late 14c., from Latin immoderatus "boundless, immeasurable," figuratively "unrestrained, excessive," from assimilated form of in- "not, opposite of" (see in- (1)) + moderatus "within bounds, observing moderation;" figuratively "modest, restrained," past participle of moderari "to regulate, mitigate, restrain, temper, set a measure, keep (something) within measure," from PIE root *med- "take appropriate measures." Related: Immoderately.