Definition of grammaticalize in English:

grammaticalize

verb

[WITH OBJECT]Linguistics
  • Change (an element) from one having lexical meaning into one having a largely grammatical function.

    • ‘The fact that concepts are grammaticalized differently in different languages is a major problem for translation, especially for machine translation.’
    • ‘The lexical items that become grammaticalized must first serve commonly needed discourse functions.’

Pronunciation

grammaticalize

/ɡrəˈmadikəˌlīz/