burdensome, oppressive, or troublesome; causing hardship: onerous duties.
having or involving obligations or responsibilities, especially legal ones, that outweigh the advantages: an onerous agreement.
Origin of onerous
1350–1400; Middle EnglishRelated formson·er·ous·ly, adverbon·er·ous·ness, o·ne·ros·i·ty [oh-nuh-ros-i-tee] /ˌoʊ nəˈrɒs ɪ ti/, nounnon·on·er·ous, adjectivenon·on·er·ous·ly, adverbnon·on·er·ous·ness, nounun·on·er·ous, adjectiveun·on·er·ous·ly, adverbun·on·er·ous·ness, noun
< Latin onerōsus,
equivalent to oner-
(stem of onus
) burden + -ōsus -ous
Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019
Examples from the Web for onerosity
Historical Examples of onerosity
British Dictionary definitions for onerosity
Derived Formsonerously, adverbonerousness, noun
laborious or oppressive
law (of a contract, lease, etc) having or involving burdens or obligations that counterbalance or outweigh the advantages
Word Origin for onerous
C14: from Latin onerōsus burdensome, from onus load
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition
© William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
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Word Origin and History for onerosity
late 14c., from Old French onereus, honereus (14c., Modern French onéreux) and directly from Latin onerosus, from onus (genitive oneris) "burden" (see onus).
Online Etymology Dictionary, © 2010 Douglas Harper