degrammaticalise

Verb

degrammaticalize (third-person singular simple present degrammaticalizes, present participle degrammaticalizing, simple past and past participle degrammaticalized)

1. (transitive) To make less grammatical or not grammatical.
2. (transitive) To cause (an inflectional ending, etc) to undergo degrammaticalization.
   • Using diachronic evidence from Swedish, I will show that inflectional endings may be maintained as “less cumulative” inflections, or even degrammaticalize into a derivational suffix or a clitic.2002, Ilse Wischer, Gabriele Diewald, New Reflections on Grammaticalization, John Benjamins Publishing, →ISBN, page 45