Definition of Christianize in US English:

Christianize

verb

[with object]
  • Make Christian; convert to Christianity.

    ‘he had been instructed to endeavor to Christianize the inhabitants of the islands’
    ‘a Christianized country’

Pronunciation

Christianize

/ˈkrɪstʃəˌnaɪz//ˈkrisCHəˌnīz/