Search Result for "laborious": 
Wordnet 3.0

ADJECTIVE (1)

1. characterized by effort to the point of exhaustion; especially physical effort;
- Example: "worked their arduous way up the mining valley"
- Example: "a grueling campaign"
- Example: "hard labor"
- Example: "heavy work"
- Example: "heavy going"
- Example: "spent many laborious hours on the project"
- Example: "set a punishing pace"
[syn: arduous, backbreaking, grueling, gruelling, hard, heavy, laborious, operose, punishing, toilsome]

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3 definitions retrieved:

The Collaborative International Dictionary of English v.0.48:

Laborious \La*bo"ri*ous\, a. [L. laboriosus, fr. labor labor: cf. F. laborieux.] 1. Requiring labor, perseverance, or sacrifices; toilsome; tiresome. [1913 Webster] Dost thou love watchings, abstinence, or toil, Laborious virtues all? Learn these from Cato. --Addison. [1913 Webster] 2. Devoted to labor; diligent; industrious; as, a laborious mechanic. [1913 Webster] -- La*bo"ri*ous*ly, adv. -- La*bo"ri*ous*ness, n. [1913 Webster]
WordNet (r) 3.0 (2006):

laborious adj 1: characterized by effort to the point of exhaustion; especially physical effort; "worked their arduous way up the mining valley"; "a grueling campaign"; "hard labor"; "heavy work"; "heavy going"; "spent many laborious hours on the project"; "set a punishing pace" [syn: arduous, backbreaking, grueling, gruelling, hard, heavy, laborious, operose, punishing, toilsome]
Moby Thesaurus II by Grady Ward, 1.0:

103 Moby Thesaurus words for "laborious": Herculean, abstruse, ardent, arduous, assiduous, backbreaking, brutal, burdensome, careful, complex, critical, crushing, delicate, demanding, detailed, determined, difficile, difficult, diligent, dogged, effortful, energetic, exacting, exhausting, exhaustive, fatiguing, fervent, forced, formidable, grueling, hairy, hard, hard-earned, hard-fought, hard-working, hardworking, heavy, hefty, indefatigable, industrious, intricate, jawbreaking, killing, knotted, knotty, labored, mean, never idle, no picnic, not easy, obdurate, obstinate, onerous, operose, oppressive, overworked, painful, painstaking, persevering, persistent, ponderous, punishing, relentless, rigorous, rough, rugged, scrupulous, sedulous, set with thorns, severe, sleepless, spiny, steadfast, steady, steep, stiff, strained, strenuous, stubborn, taxing, thorny, thorough, ticklish, tireless, tiring, toilsome, tough, tricky, troublesome, unflagging, unrelenting, unremitting, unsleeping, unsparing, untiring, unwavering, unwearied, uphill, vehement, wearisome, wearying, wicked, zealous