Synonyms and Antonyms of alacritous
having or showing the ability to respond without delay or hesitation - His alacritous response to every request is "Right away, mate!"
receptive, responsive
immediate, instant, instantaneous, summary
breakneck, breathless, brisk, fast, fleet, fleet-footed, hit-and-run, lightning, rapid, rapid-fire, rattling, snappy, speedy, swift, whirlwind
eager, keen, sharp
apt, clever, quick, quick-witted, ready-witted, sharp-witted, smart
unresponsive
crawling, creeping, dallying, dawdling, dilatory, dillydallying, dragging, laggard, lagging, lazy, lazyish, leisurely, logy (also loggy), poking, poky (or pokey), slothful, slow, slowish, sluggish, tardy, unhurried
dormant, idle, inactive, inert