xenophobe (n.)

word-forming element meaning "one who dreads, fears, or hates," from French -phobe, from Latin -phobus, from Greek -phobos "fearing," from phobos "fear, panic, flight," phobein "put to flight, frighten" (see phobia).

before vowels, xen-, word-forming element meaning "strange, foreign; stranger, foreigner," from Greek xenos "a guest, stranger, foreigner, refugee, guest-friend, one entitled to hospitality," cognate with Latin hostis, from PIE root *ghos-ti- "stranger, guest, host." "The term was politely used of any one whose name was unknown" [Liddell & Scott].