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Use "backformation" in a sentence
"He's written some more about this kind of backformation, this time with the verbs serial kill, underage drink, fence-sit, arm-flap, problem-solve"
"Back-formation (or back formation or backformation) is a term that describes the way certain words are formed."
"Example: “His parents were so connected that she was constantly dorphaned.” insignificant other (noun – backformation from significant other) Any once-important person made unimportant through social media."