missionize
/ˈmɪʃənʌɪz/(also missionise)
verb
1 [no object] To conduct or promote a mission; to serve as a missionary, do missionary work.
2 [with object] To do missionary work among (a people) or in (a place). Also: (with pejorative connotation) to impose missionary influence upon (a people).
Origin
Early 19th century; earliest use found in Blackwood's Magazine. From mission + -ize.