Synonyms and Antonyms of laborious
1 involved in often constant activity <the volunteers have been commendably laborious in their cleanup of the beach> Synonyms active, assiduous, bustling, diligent, employed, engaged, hopping, industrious, busy, occupied, sedulous, tied-up, workingRelated Words knee-deep, swamped; animated, astir, buzzing, flourishing, happening, humming, lively, thriving, vibrant; absorbed, concentrating, engrossed, focused (also focussed), immersed, intent, preoccupied; alive, functional, functioning, going, living, operating, operational, operative, running; energetic, vigorous; hardworking; indefatigable, tireless, untiringNear Antonyms free; asleep, dormant, latent, lifeless, quiescent, sleepy; inert, passive; dead, dull, slow; inoperative, nonoperatingAntonyms idle, inactive, unbusy, unemployed, unoccupied
2 requiring considerable physical or mental effort <the laborious task of cleaning up the oil spill> Synonyms arduous, Augean, backbreaking, challenging, demanding, difficult, effortful, exacting, formidable, grueling (or gruelling), heavy, hellacious, herculean, killer, hard, moiling, murderous, pick-and-shovel, rigorous, rough, rugged, severe, stiff, strenuous, sweaty, tall, testing, toilsome, tough, uphillRelated Words abstract, abstruse, complex, complicated, elusive, hairy, insoluble, intricate, involved, knotty, opaque, problematic (also problematical), recondite, serious, spiny, stubborn, thorny, ticklish, tricky; bruising, burdensome, exhausting, labored, onerous, oppressive, stressful, taxing, tight, trying; annoying, bothersome, distressing, irksome, troublesome, vexatious; grievous, grim, strict, stringent; brutal, cruel, inhuman, painfulNear Antonyms achievable, clear, doable, elementary, manageable, uncomplicated; comforting, gentle, painless, relaxed, smooth, soothing; accessible, friendly, idiotproof, user-friendlyAntonyms cheap, easy, effortless, facile, light, mindless, simple, soft, undemanding
3 requiring much time, effort, or careful attention <that report is the product of months of laborious research> Synonyms arduous, burdensome, challenging, exacting, grueling (or gruelling), killing, demanding, 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
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