back formation

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noun Linguistics.

the analogical creation of one word from another word that appears to be a derived or inflected form of the first by dropping the apparent affix or by modification.

a word so formed, as typewrite from typewriter.

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Origin of back formation

First recorded in 1885–90

Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2022

How to use back formation in a sentence

Think back to the Bush-Kerry race of 2004, the Thrilla in Vanilla.
Jeb Bush’s Unseen Anti-Gay Marriage Emails|Jackie Kucinich|January 9, 2015|DAILY BEAST
Back in New York, the slow pace and inward focus of her yoga practice was less fulfilling.
How Taryn Toomey’s ‘The Class’ Became New York’s Latest Fitness Craze|Lizzie Crocker|January 9, 2015|DAILY BEAST
Music is a huge part of the tone of Black Dynamite overall—going back to the original 2009 movie on which the series is based.
‘Black Dynamite’ Presents Police Brutality: The Musical|Stereo Williams|January 9, 2015|DAILY BEAST
The al Qaeda-linked gunmen shot back, but only managed to injure one officer before they were taken out.
France Kills Charlie Hebdo Murderers|Nico Hines|January 9, 2015|DAILY BEAST

So, Islamized teaching sends girls back home for marriage and housework, and remains exclusively for boys.
Houellebecq’s Incendiary Novel Imagines France With a Muslim President|Pierre Assouline|January 9, 2015|DAILY BEAST
I waited three months more, in great impatience, then sent him back to the same post, to see if there might be a reply.
The Boarded-Up House|Augusta Huiell Seaman
Ages back—let musty geologists tell us how long ago—'twas a lake, larger than the Lake of Geneva.
Blackwood's Edinburgh Magazine, Volume 60, No. 372, October 1846|Various
The boys were tumbling about, clinging to his legs, imploring that numerous things be brought back to them.
The Awakening and Selected Short Stories|Kate Chopin
With a suffocating gasp, she fell back into the chair on which she sat, and covered her face with her hands.
The Pastor's Fire-side Vol. 3 of 4|Jane Porter
She was holding the back of her chair with one hand; her loose sleeve had slipped almost to the shoulder of her uplifted arm.
The Awakening and Selected Short Stories|Kate Chopin

British Dictionary definitions for back formation

back formation

noun

the invention of a new word on the assumption that a familiar word is derived from it. The verbs edit and burgle were so created from editor and burglar

a word formed by this process

Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012