"comprehending much in few words," 1580s, from Latin concisus "cut off, brief," past participle of concidere "to cut off, cut up, cut through, cut to pieces," from assimilated form of com-, here probably an intensive prefix (see con-), + caedere "to cut" (from PIE root *kae-id- "to strike"). Related: Concisely.
Concise frequently refers to style, and signifies the expression of much in few words; succinct is generally applied to the matter, the less important things being omitted: thus a concise style or phrase, but a succinct narrative or account. [Century Dictionary]