Dictionary.com
Thesaurus.com
Synonyms

onerous

American  
[on-er-uhs, oh-ner-] / ˈɒn ər əs, ˈoʊ nər- /

adjective

  1. burdensome, oppressive, or troublesome; causing hardship.

    onerous duties.

    Synonyms:
    galling, irksome, grievous, heavy
  2. having or involving obligations or responsibilities, especially legal ones, that outweigh the advantages.

    an onerous agreement.


onerous British  
/ ˈəʊ-, ˈɒnərəs /

adjective

  1. laborious or oppressive

  2. law (of a contract, lease, etc) having or involving burdens or obligations that counterbalance or outweigh the advantages

"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

Other Word Forms

  • nononerous adjective
  • nononerously adverb
  • nononerousness noun
  • onerosity noun
  • onerously adverb
  • onerousness noun
  • unonerous adjective
  • unonerously adverb
  • unonerousness noun

Etymology

Origin of onerous

1350–1400; Middle English < Latin onerōsus, equivalent to oner- (stem of onus ) burden + -ōsus -ous

Example Sentences

Examples are provided to illustrate real-world usage of words in context. Any opinions expressed do not reflect the views of Dictionary.com.

Many European entrepreneurs blame Europe’s plight on a risk-averse culture, fragmented market and onerous regulations.

From The Wall Street Journal

Additional onerous rules applied by the Chinese government on rare-earth exports last year has raised the anxiety around procurement of these materials in the future for the rest of the world.

From The Wall Street Journal

Last month, the White House issued an executive order that aims to challenge “onerous” state laws deemed as stymieing AI innovation.

From The Wall Street Journal

In other words, if earnings can hold up, stock gains can continue, making the market’s already high valuations less onerous.

From Barron's

“Without proper advance planning, transferring private-equity interests can be problematic and often involves high fees and onerous restrictions on when a transfer can take place.”

From The Wall Street Journal