killing

1 causing or intended to cause laughter he's usually quiet, but occasionally unleashes some killing remark that cracks everyone up Synonyms antic, chucklesome, comedic, comic, comical, droll, farcical, hilarious, humoristic, humorous, hysterical (also hysteric), funny, laughable, ludicrous, ridiculous, riotous, risible, screaming, sidesplitting, uproariousRelated Words amusing, diverting, entertaining; clownish, knockabout, slapstick, slapsticky, zany; facetious, flip, flippant, pert, smart, smart-aleck, smart-alecky, snickery; jocular, playful, waggish; campy, jokey (also joky); priceless, rich, whimsical, witty, wry; blithesome, gleeful, jocose, jocund, jolly, jovial, laughing, mad, merry, mirthfulNear Antonyms earnest, grave, no-nonsense, sedate, serious, severe, sober, sobersided, solemn, somber (or sombre), staid, unsmiling, weighty; affecting, moving, poignant, touching, tragic (also tragical); lachrymose, mournful, sad, sorrowful, tearful, woefulAntonyms humorless, lame, unamusing, uncomic, unfunny, unhumorous, unhysterical

2 requiring much time, effort, or careful attention a killing schedule that requires the touring company to play in a different city every night Synonyms arduous, burdensome, challenging, exacting, grueling (or gruelling), demanding, laborious, onerous, persnickety, taxing, toilsomeRelated Words difficult, formidable, hard, herculean, rough, rugged, stiff, strenuous, testing, tough; oppressive, trying; rigid, rigorous, severe, stern, strict, stringentNear Antonyms easy, effortless, facile, simple, smoothAntonyms light, nondemanding, unchallenging, undemanding