Cần cù, siêng năng, chăm chỉ, chịu khó

Khó nhọc, gian khổ

laborious task

một công việc khó nhọc

Nặng nề, không thanh thoát (hành văn)

Arduous, burdensome, onerous, strenuous, gruelling,back-breaking, Herculean, exhausting, taxing, tiring, fatiguing,wearying, wearisome, toilsome, difficult, tough, hard, uphill,stiff: Few realize how laborious farm work can be.

Painstaking, detailed, careful, thorough, diligent, scrupulous,exhaustive, steady, steadfast, relentless, unrelenting, dogged,assiduous, sedulous, persevering, persistent, untiring,tireless, indefatigable, unremitting: After laborious researchthe virus was finally identified.

Industrious, hard-working,dogged, determined, unwavering, obstinate, stubborn, unflagging,obdurate: He made a laborious effort to get ahead.

Laboured,strained, forced, ponderous, overworked: The book contains someof the most laborious prose ever written.

Needing hard work or toil (a laborious task).

(esp.of literary style) showing signs of toil; pedestrian; notfluent.

Laboriously adv. laboriousness n. [ME f. OFlaborieus f. L laboriosus (as LABOUR)]