uncontrollable (adj.)youdaoicibaDictYouDict[uncontrollable 词源字典]
1570s, "irrefutable," from un- (1) "not" + controllable. From 1590s as "not subject to authority;" meaning "that cannot be restrained" is from 1640s. Related: Uncontrollably.[uncontrollable etymology, uncontrollable origin, 英语词源]