onerous [adjective]: (of a task) burdensome and difficult to accomplish.
Example: Not surprisingly, the onerous task of correcting the 200 answer sheets fell on the youngest member of the faculty.
Related words: onerously [adverb], onerousness [noun]
Synonyms: arduous, burdensome, demanding, difficult, heavy, exhausting, fatiguing, formidable, grueling, harsh, laborious, oppressive, ponderous, strenuous, taxing
Antonyms: easy, effortless, facile
Tags: GRE
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