Laborious

Adjective

 * 1) Requiring much physical effort; toilsome.
 * 2) Mentally difficult; painstaking
 * 3) Industrious.

Adverbs for Laborious
extremely; oppressively; intricately; objectionably; unexpectedly; surprisingly; unremittingly;  sedulously;   overwhelmingly; enormously; immensely; painfully; incredibiy; grievously; strenuously; fantastically; moderately; dreadfully; pleasantly; wholesomely; backbreakingly; elaborately; wearisomely; terribly; undeniably; unbelievably.

Thesaurus
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

Alternative forms

 * labourious

Translations

 * Czech:
 * French: laborieux
 * Italian:


 * Latin:
 * Old English:
 * Portuguese: laborioso
 * Russian: трудный, тяжёлый, напряжённый, утомительный


 * Latin:


 * Scottish Gaelic: dèanadach