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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Serialization itself is interesting—the inadvertent or almost incidental meaning that can come from putting one thing next to another thing.—
Amanda Petrusich,
New Yorker,
30 Aug. 2026 Manchester United will make a minor change to their kit for their first home game of the season against Ipswich Town, after an inadvertent breach of Premier League kit regulations against Hull City.—
Cerys Jones,
New York Times,
26 Aug. 2026 OpenAI’s inadvertent hack of Hugging Face saw its model fire off as many as 300 actions an hour, and a single agent can spawn sub-agents that make tool calls of their own.—IEEE Spectrum,
16 Aug. 2026 Officials blamed the inadvertent incursion on Russian electronic warfare.—CBS News,
9 Aug. 2026 See All Example Sentences for inadvertent