ev-uh-NESS-ent
(adjective) Quickly fading or disappearing.
The rainbow was evanescent, gone within minutes of appearing.
Fun Fact
From the Latin evanescere, meaning “to disappear,” this word often pops up in poetry, weather reports, and tech product reviews. It’s used when something is not just short-lived—but so brief it almost feels unreal. A spark, a moment, a trend—it’s there, and then it isn’t.
OH-ner-us
(adjective) Involving a great deal of effort, difficulty, or responsibility; oppressively burdensome.
The onerous reporting requirements buried small business owners in paperwork, leaving little time for the actual work of running their companies.
From Latin onerosus, meaning “burdensome” — derived from onus, meaning “load or burden.” The root onus entered English directly as well, giving us the phrase “the onus is on you,” meaning the burden of responsibility falls to you. Related words include exonerate — literally to remove the burden from someone — and onerously. The word entered English in the late 14th century, used primarily in legal contexts to describe obligations or duties that imposed an unreasonable weight on one party.
Fun Fact
In contract law, an “onerous contract” has a very specific and serious meaning — it refers to a contract in which the costs of fulfilling the obligations outweigh the expected benefits. When a company identifies an onerous contract on its books, accounting standards require it to be disclosed and provisioned for immediately, because it represents a guaranteed future loss. During economic downturns, onerous contract disclosures can trigger significant drops in a company’s stock price — the moment investors see the word in a financial filing, they know the company is locked into something it cannot escape without losing money either way.