adj.

1. Troublesome or oppressive; burdensome. See synonyms at burdensome.
2. Law. Entailing obligations that exceed advantages.

[Middle English, from Old French onereus, from Latin onerōsus, from onus, oner-, burden.]

onerously on'er·ous·ly adv.
onerousness on'er·ous·ness n.

adjective

Requiring great or extreme bodily, mental, or spiritual strength: arduous, backbreaking, burdensome, demanding, difficult, effortful, exacting, exigent, formidable, hard, heavy, laborious, oppressive, rigorous, rough, severe, taxing, tough, trying, weighty. See heavy/light.

adj

Definition: very difficult; requiring hard labor
Antonyms: common, easy, effortless, light, trivial

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IN BRIEF: adj. - Troublesome and oppressive.

The large boulders dotting the field presented an onerous task.

Tutor's tip: This word was used in the 2006 Scripps National Spelling Bee finals.

Dansk (Danish)
adj. - byrdefuld, besværlig

Nederlands (Dutch)
drukkend, bewerkelijk

Français (French)
adj. - lourd, pénible

Deutsch (German)
adj. - belastend

Ελληνική (Greek)
adj. - βαρύς, επαχθής, δυσβάστακτος, καταπιεστικός, (νομ.) βεβαρημένος

Italiano (Italian)
oneroso

Português (Portuguese)
adj. - oneroso, incômodo

Русский (Russian)
обременительный, хлопотный

Español (Spanish)
adj. - oneroso, pesado

Svenska (Swedish)
adj. - betungande, besvärlig, belastad

中文（简体） (Chinese (Simplified))
繁重的, 负有义务的, 麻烦的, 有偿的

中文（繁體） (Chinese (Traditional))
adj. - 繁重的, 負有義務的, 麻煩的, 有償的

한국어 (Korean)
adj. - 성가신, 부담이 따르는

日本語 (Japanese)
adj. - 煩わしい, 厄介な, 面倒な, 負担付きの

العربيه (Arabic)
‏(صفه) شاق, مرهق‏

עברית (Hebrew)
adj. - ‮מכביד, מעיק, כרוך בהתחיבויות כבדות‬

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