- 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 English < Latin onerōsus, equivalent to oner- (stem of onus) burden + -ōsus -ous
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018
Examples from the Web for onerosity
Then the gratuitous and the common have gained all that onerosity and property have lost.
Property, Community, are two ideas correlative to the ideas of onerosity and gratuitousness, on which they are founded.
- laborious or oppressive
- law (of a contract, lease, etc) having or involving burdens or obligations that counterbalance or outweigh the advantages
C14: from Latin onerōsus burdensome, from onus load
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012
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