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⇱ onerous - WordReference.com Dictionary of English


onerous

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UK:**UK and possibly other pronunciationsUK and possibly other pronunciations/ˈəʊnərəs/US:USA pronunciation: IPA and respellingUSA pronunciation: IPA/ˈɑnərəs, ˈoʊnər-/ ,USA pronunciation: respelling(onər əs, ōnər-)


WordReference Random House Learner's Dictionary of American English © 2026
on•er•ous /ˈɑnərəs, ˈoʊnər-/USA pronunciation   adj. 
  1. being a burden;
    troublesome:an onerous task.

WordReference Random House Unabridged Dictionary of American English © 2026
on•er•ous  (onər əs, ōnər-),USA pronunciation adj. 
  1. burdensome, oppressive, or troublesome; causing hardship:onerous duties.
  2. having or involving obligations or responsibilities, esp. legal ones, that outweigh the advantages:an onerous agreement.
  • Latin onerōsus, equivalent. to oner- (stem of onus) burden + -ōsus -ous
  • Middle English 1350–1400
oner•ous•ly, adv. 
    1. heavy, crushing, grievous; irksome, galling.

Collins Concise English Dictionary © HarperCollins Publishers::
onerous /ˈɒnərəs; ˈəʊ-/ adj
  1. laborious or oppressive
  2. (of a contract, lease, etc) having or involving burdens or obligations that counterbalance or outweigh the advantages
Etymology: 14th Century: from Latin onerōsus burdensome, from onus loadˈonerously adv ˈonerousness n
'onerous' also found in these entries (note: many are not synonyms or translations):

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