early 15c., "having one's belt fastened tightly," from Middle French succincte, from Latin succinctus "prepared, ready; contracted, short," past participle of succingere "tuck up (clothes for action), gird from below," from assimilated form of sub "up from under" (see sub-) + cingere "to gird" (see cinch, n.). Sense of "brief, concise" first recorded 1530s. Related: Succinctness.