Ge-cristnian

According to the Old English Dictionary:

ge-cristnian

p. ode, ade; pp. od, ad [cristnian to christianize] To christianize, catechize; catechīzāre :-- He ðone cyning gecristnade, and hine eft æfter fæce mid fulluhtbæþe aþwógh mid his þeóde cum rex ipse catechīzāus, fonte baptism, cum sua gente abluĕrētur, Bd. 3, 7; S. 329, 13. Syððan he gecristnad wæs cum catechīzārētur, 2, 14; S. 517, 27 : Blickl. Homl. 211, 29 : 213, 15 : 215, 22. Ne mót gefullod inne mid ðam gecristnedan etan non licel baptizato cum catecumeno comedere, Th. Lg. ii. 144, 25. ge-cristnian