De-categorialization

/dəkˌatɪɡəɹˌɪəlaɪzˈeɪʃən/

/dəkˌæɾɪɡɚɹˌɪəlaɪzˈeɪʃən/

the process by which a word or morpheme loses its original grammatical category and acquires a more independent, lexical function