back formation

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or back formation (băk′fôr-mā′shən)
1. A new word created by removing an affix from an already existing word, as vacuum clean from vacuum cleaner, or by removing what is mistakenly thought to be an affix, as bicep from the English plural biceps.
2. The process of forming words in this way.

back′-form′ (băk′fôrm′) v.
back′-formed′ (băk′fôrmd′) adj.
American Heritage® Dictionary of the English Language, Fifth Edition. Copyright © 2016 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.

back formation

1. (Linguistics) 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
2. (Linguistics) a word formed by this process
Collins English Dictionary – Complete and Unabridged, 12th Edition 2014 © HarperCollins Publishers 1991, 1994, 1998, 2000, 2003, 2006, 2007, 2009, 2011, 2014

back′ forma`tion

1. 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.
2. a word so formed, as typewrite from typewriter.
Random House Kernerman Webster's College Dictionary, © 2010 K Dictionaries Ltd. Copyright 2005, 1997, 1991 by Random House, Inc. All rights reserved.
References in periodicals archive ?
Instead, the United manager might look to experiment with a three at the back formation this weekend, with the arrival of Aaron Wan-Bissaka surely making the prospect of deploying wing backs that bit more enticing.
Yet any three at the back formation will always be vulnerable to a good winger and Jota looked exactly that.
And unless Warnock opts for a bold five at the back formation - as used by Chris Coleman's Wales side - that would enable him to incorporate each of the mentioned central defenders, something simply has to give if Morrison is to feature as prominently as he did last season.
(css) back formation < recision, cutting back (how ironic)
He said his Party would back formation of new Provinces in accordance with the constitution.
* Enthuse is not an adjective, but a verb, a back formation of the noun "enthusiasm." Incorrect: "I'm enthused about this opportunity." Correct: "I'm enthusiastic about this opportunity," she enthused.
Over the last couple of years we have gotten into more of the one back formation, more wide receivers, and more tight ends.