It may look innocent, but inadvertent belongs to a class of words that provoke anger in many people who care about language – to wit, the back-formation. Bucking the usual trend in which longer words are formed from shorter ones by the addition of an affix (for example, superficiality from superficial), back-formations are created by clipping off a piece of a longer word; in this case, inadvertent was back-formed from inadvertence or inadvertency.
A fair number of these words populate English, including brainwash (from brainwashing), complicit (from complicity), escalate (from escalator), and televise (from television). Certain back-formations, such as liaise (which comes from liaison) rub some people the wrong way. While they are under no obligation to accept liaise, there is nothing inherently wrong with back-formations; they are just another way our language has of creating new words.
an inadvertent encounter with a rattlesnake in the brush
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However, after Monday's inadvertent alarm, the office is looking at that policy.—Sarah Horbacewicz, CBS News, 10 June 2026 That’s where the irony of the show’s premise ends up sounding like an inadvertent confession.—Jackson McHenry, Vulture, 3 June 2026 Additionally, the inadvertent retractor pretensioner deployment, in some cases, can also cause injury to the occupant due to rapid seatbelt retraction.—Saman Shafiq, USA Today, 3 June 2026 Its inadvertent ability to double up as a whoopee cushion when sat on did not help its case.—Jack Bantock, CNN Money, 14 May 2026 See All Example Sentences for inadvertent