back-form

== English == === Alternative forms === backform === Etymology === A back-formation from back-formation. === Noun === back-form (plural back-forms) A back-formation; a word formed by removing a perceived morpheme from an older word. === Verb === back-form (third-person singular simple present back-forms, present participle back-forming, simple past and past participle back-formed) (transitive) To form a word by a back-formation process.