Longman Dictionary of Contemporary English
fore-
prefix
EXAMPLES FROM OTHER ENTRIES
▪ forethought
▪ his strong forearms
▪ in the foreground
▪ the factory foreman
▪ to forewarn someone
Douglas Harper's Etymology Dictionary
fore-
Middle English for-, fore-, from Old English fore-, often for- or foran-, from fore (adv. & prep.), which was used as a prefix in Old English as in other Germanic languages with a sense of "before in time, rank, position," etc., or designating the front part or earliest time.
Wiktionary
fore-
pre. before, in front of.