onerous

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

ADJECTIVE

difficult; requiring hard labor

Synonyms

STRONGEST

arduous backbreaking burdensome cumbersome demanding difficult distressing excessive exhausting grueling harsh intolerable laborious oppressive painful rigorous severe strenuous taxing troublesome weighty

WEAK

austere crushing embittering exacting exigent fatiguing formidable galling grave grinding hard headache heavy irksome merciless overpowering overtaxing plodding ponderous pressing responsible serious tiresome tiring toilsome vexatious

Antonyms

STRONGEST

calm easy effortless facile friendly gentle helpful mild nice simple trivial

WEAK

light

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.

And if even that felt too onerous, they could console themselves that everyone is paying 1%, even the 10-year-old who made $100 selling lemonade.

From MarketWatch • May 7, 2026

KP Law added that some requests are "consistent with an intention to be onerous to the point of oppression" and ultimately stifle the litigation.

From BBC • Apr. 29, 2026

Other infrastructure projects have also fared poorly, with critics complaining of onerous permit procedures and strict rules around all aspects of construction.

From Barron's • Apr. 22, 2026

When recycled materials are stranded because of onerous trade restrictions, the result is lower investment, fewer jobs for American workers and unstable supply of feedstock for U.S. manufacturing.

From The Wall Street Journal • Apr. 14, 2026

He reads from the square of paper in the same onerous voice he used for ours, informing Panem that in honor of the Quarter Quell, there will be twice the number of tributes.

From "Catching Fire" by Suzanne Collins

Vocabulary lists containing onerous

300 Most Difficult "SAT" Words

Looking to grow your vocabulary? Check out this interactive, curated word list from our team of English language specialists at Vocabulary.com – one of over 17,000 lists we've built to help learners worldwide!

Into the Wild

Interested in learning more words like this one? Our team at Vocabulary.com has got you covered! You can review flashcards, quiz yourself, practice spelling, and more – and it's all completely free to use!

The Legend of Sleepy Hollow

Want to remember this word for good? Start your learning journey today with our library of interactive, themed word lists built by the experts at Vocabulary.com – we'll help you make the most of your study time!