mis·sion·ize 
(mĭshə-nīz′)
(mĭshə-nīz′)v. mis·sion·ized, mis·sion·iz·ing, mis·sion·iz·es
v.intr.
To do missionary work.
v.tr.
1. To perform missionary work in or among.
2. To bring under the influence or control of a mission: "Eastern Apaches in what is now Texas were even missionized—briefly—in the eighteenth century" (William Brandon).