unbeknownst
adjective
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For reasons unbeknownst to perhaps all of us, unbeknownst is a word in good standing. It has the ring of a true archaism, what with that -st ending we know from such Shakespearean gems as “thou dost snore distinctly,” and yet it is not what it seems; unbeknownst may resemble archaic verb forms like dost and canst, but it’s just playing dress-up. To authentically use dost and canst one has to be addressing someone else, and no one has ever said “thou unbeknownst,” or even “thou beknownst.” Beknown, which had some meager use between the 16th and 19th centuries, was a form of the verb beknow (in use between the 14th and 16th centuries) but was mostly used as an adjective meaning “known, familiar.” If anything would get the -st ending, it would be beknow, and the form would be beknowst or beknowest. All this to say, when unbeknownst started cropping up in fictional dialogue in the early decades of the 19th century, the word did not please everyone. By the early 20th century, it was being disparaged as “a vulgar provincialism” and a term “out of use except in dialect or uneducated speech.” The slander has done no good whatsoever. Unbeknownst is perfectly standard today, even in formal prose. Note that speakers of British English prefer unbeknown, which lacks that unjustified -st and is 200 years older. Perhaps our friends across the pond beknow more than we do.
Examples of unbeknownst in a Sentence
Ew Staff, EW.com, 1 July 2024
For a surprise at the end, unbeknownst even to King, Winfrey arranged a path lined with sparklers, framing the couple in a golden glow against the night sky.
—Theresa Braine, New York Daily News, 6 June 2024
Raymond Lee stars in the series as Dr. Ben Song, a physicist on the Quantum Leap project who, unbeknownst to his fellow team members, has upgraded the Quantum Leap accelerator and sends himself back in time and into the bodies of people in the past.
—Rick Porter, The Hollywood Reporter, 12 Dec. 2022
She is joined once again by her Gen Z writing partner Ava Daniels (Hannah Einbinder), who — unbeknownst to Deborah — got drunk and sent a nasty email about Deborah to some equally nasty producers.
—Karla Peterson, San Diego Union-Tribune, 30 Sep. 2022
See All Example Sentences for unbeknownst
Cite this Entry
“Unbeknownst.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/unbeknownst. Accessed 30 Oct. 2025.
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unbeknownst
adjective
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