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French word copine comes from French -ine, French copain
-ine (French)
copain (French)
(informal) boyfriend (boy/man to which one has a romantic attachment). (male) friend, chum, mate (UK), pal, buddy.
copine (French)
(informal) (female) friend, girl friend, chum, pal. (informal) girlfriend (girl/woman to whom one has a romantic attachment).