early 15c., "having one's belt fastened tightly," 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.

1816, "amber-colored mineral," from -ite (1) + Latin succinum "amber," which Klein calls a loan word from a Northern European language that has been assimilated in form to Latin succus, sucus "juice, sap." Related: Succinic, from French succinique.

1530s, from succinct + -ly (2).