insolent Look up insolent at Dictionary.com
late 14c., "proud, disdainful, haughty, arrogant," from L. insolentem (nom. insolens) "arrogant, immoderate," lit. "unusual," from in- "not" + solentem, prp. of solere "be accustomed," which possibly is related to sodalis "close companion," and to suescere "become used to." Meaning "contemptuous of rightful authority" is from 1670s.