Word of the Day:

May 24, 2026

onus

noun OH-nuss

What it Means

Onus is a formal word typically used to refer to a responsibility, obligation, or burden. It is usually preceded by the word the.

// Management has made it clear that the onus is on employees to ask for further training if they don’t understand the new procedures.

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Onus in Context

“The [London Book Fair] comes the week before the government is due to deliver its progress report on AI and copyright, after proposals for a relaxation of existing laws caused outrage last year. Philippa Gregory, the novelist, described the plans for an ‘opt-out’ policy, which puts the onus on writers to refuse permission for their work to be trawled, as akin to putting a sign on your front door asking burglars to pass by.” — The Guardian (London), 13 Mar. 2026

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Did You Know?

Understanding the etymology of onus shouldn’t be a burden; it’s as simple as knowing that English borrowed the word—spelling, meaning, and all—from Latin in the 17th century. Onus is also a distant relative of the Sanskrit word anas, meaning cart (as in, a wheeled wagon or vehicle that carries a burden). English isn’t exactly loaded with words that come from Latin onus, but onerous (“difficult and unpleasant to do or deal with”) is one, which is fitting since in addition to being synonymous with “burden,” onus has also long been used to refer to obligations and responsibilities that one may find annoying, taxing, disagreeable, or distasteful.