active, brisk, brisk as a lark, brisk as a bee; lively, animated, vivacious; alive, alive and kicking; frisky, spirited, stirring. nimble, nimble as a squirrel; agile; light-footed, nimble-footed; featly^, tripping. quick, prompt, yare^, instant, ready, alert, spry, sharp, smart; fast &c (swift) 274; quick as a lamplighter, expeditious; awake, broad awake; go-ahead, live wide-awake &c (intelligent) 498 [U.S.].