- 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
SynonymsSee more synonyms for onerous on Thesaurus.com
Examples from the Web for onerous
The pair had argued, and the assistant ceased performing this most onerous of duties.A Million Ways to Die in Prison
December 8, 2014
The demand of being an EU state have been onerous and living conditions have not improved.In Hands of Hungarian Artist, Jewish Home Movies of the ’30s a Warning of Coming Holocaust
October 25, 2014
Help with onerous conditions is not help so much as benevolent coercion.America’s Meddlers Are Our Worst Enemies
October 3, 2014
He managed to put these onerous, labor-intensive veggies at the forefront of his restaurant—and found much success.Rodrigo de la Calle Is Spain’s Vegetable Whisperer
March 19, 2014
The new FSA media requirements, however, will be onerous for freelancers if they are maintained.Syria’s Media War
April 4, 2013
They are not onerous, and will not interfere with the daily life of the country.
There is a dignity to be borne which, though it may be onerous, must be supported.Is He Popenjoy?
The door-keeper of the gaming-house holds an onerous responsibility.The Grell Mystery
He is willing to surrender, if the terms are not too onerous.At the Point of the Bayonet
G. A. Henty
The plan of search adopted by Professor Challis was an onerous one.The Story of the Heavens
Robert Stawell Ball
- laborious or oppressive
- law (of a contract, lease, etc) having or involving burdens or obligations that counterbalance or outweigh the advantages
Word Origin and History for onerous
late 14c., from Old French onereus, honereus (14c., Modern French onéreux) and directly from Latin onerosus, from onus (genitive oneris) "burden" (see onus).