Moving quickly and lightly:
— The old dog was so spry it was halfway up the stairs before we could stop it.

synonyms: agile, nimble, quick.

Roget 836: cheerful; happy etc. 827; cheery, cheerly^†; of good cheer, smiling; blithe; in spirits, in good spirits; breezy, bully, chipper [U.S.]; in high spirits, in high feather; happy as the day is long, happy as a king; gay as a lark; allegro; debonair; light, lightsome, light hearted; buoyant, debonnaire, bright, free and easy, airy; janty^†, jaunty, canty^†; hedonic^†; riant^†; sprightly, sprightful^†; spry; spirited, spiritful^†; lively, animated, vivacious; brisk as a bee; sparkling, sportive; full of play, full of spirit; all alive.    sunny, palmy; hopeful etc. 858.    merry as a cricket, merry as a grig^†, merry as a marriage bell; joyful, joyous, jocund, jovial; jolly as a thrush, jolly as a sandboy^†; blithesome; gleeful, gleesome^†; hilarious, rattling.    winsome, bonny, hearty, buxom.    playful, playsome^†; folatre [Fr.], playful as a kitten, tricksy^†, frisky, frolicsome; gamesome; jocose, jocular, waggish; mirth loving, laughter-loving; mirthful, rollicking.    elate, elated; exulting, jubilant, flushed; rejoicing etc. 838; cock-a-hoop.    cheering, inspiriting, exhilarating; cardiac, cardiacal^†; pleasing etc. 829; palmy.    ... show more

Roget 682: 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 etc. (swift) 274; quick as a lamplighter, expeditious; awake, broad awake; go-ahead, live wide-awake [U.S.] etc. (intelligent) 498.    forward, eager, strenuous, zealous, enterprising, in earnest; resolute etc. 604.    industrious, assiduous, diligent, sedulous, notable, painstaking; intent etc. (attention) 457; indefatigable etc. (persevering) 604.1; unwearied; unsleeping^†, never tired; plodding, hard-working etc. 686; businesslike, workaday.    bustling; restless, restless as a hyena; fussy, fidgety, pottering; busy, busy as hen with one chicken.    working, at work, on duty, in harness; up in arms; on one's legs, at call; up and doing, up and stirring.    busy, occupied; hard at work, hard at it; up to one's ears in, full of business, busy as a bee, busy as a one-armed paperhanger.    meddling etc. v.; meddlesome, pushing, officious, overofficious^†, intrigant^†.    astir, stirring; agoing^†, afoot; on foot; in full swing; eventful; on the alert, etc. (vigilant) 459.    ... show more

Polish: zwinny