A few of the foll. comps. had orig. the prefix FOR-2.
forearm1 arm beforehand. XVI. forearm2 part of the arm below the elbow. XVIII. forecast †contrive beforehand XIV; estimate beforehand XVI.
Hence as sb. XV. forecastle (whence the sp. fo'c'sle) †short raised deck in the bow, orig. a castle-like structure to command the enemy's decks XIV; fore part of a ship XV. forefather XIII. — ON. forfaðir, forefinger XV. forefoot XIV. forefront principal face, foremost part (now dial. exc. fig.). XV (orig. Sc.). foregoing XV. foregone that has gone before. XVI. foreground XVII. forehead OE. forhēofod = MLG. vorhōved, Du. voorhoofd, G. vor(der)haupt. forejudge XVI. foreknowledge XVI. Cf. foreknow XIV. foreland cape, promontory. XIV. forelock OE. foreloccas pl.; but a new formation in XVI. foreman †leader XV; principal juror; principal of workmen XVI; perh. after ON. formaðr captain, leader, or — Du. voorman, forename XVI. forenoon XV. forepart XIV. forerunner one who goes before to prepare the way (first of John the Baptist) XIII; one whom another follows XVI; tr. L. præcursor PRECURSOR. foresail XV. foresee OE. forsēon; but prob. a new formation in ME. foreshore XVIII. foreshorten XVII. foreshow XVI. foresight †(divine) providence XIII; provision for the future XIV; action of foreseeing or looking forward XV; prob. after ON. forsjá, and later felt as etym. rendering of (O)F. providence, L. prōvidentia. foreskin XVI. forestall †obstruct XIV; buy up (goods) before they reach public markets XIV; hinder by anticipation, anticipate in action XVI. Implied earlier in AL. forstallatio obstruction, forstallator (XII), AN. forstallour forestaller of markets (XIII), f. OE. for(e)steall interception, ambush, foretaste sb. and vb. XV. foretell XIII. forethought †premeditation; previous thought. XIII. parallel to †forethink, OE. foreðnċan consider beforehand, and repl. OE. foreðanc consideration, forethought, providence. foretop †lock of hair at the front XIII; †forepart of the crown XIV; top of a foremast XV. forewarn warn beforehand. OE. forewarnian (trans. and intr.). foreword XIX.
"fore-." The Concise Oxford Dictionary of English Etymology. . Encyclopedia.com. (September 18, 2018). http://www.encyclopedia.com/humanities/dictionaries-thesauruses-pictures-and-press-releases/fore-4
"fore-." The Concise Oxford Dictionary of English Etymology. . Retrieved September 18, 2018 from Encyclopedia.com: http://www.encyclopedia.com/humanities/dictionaries-thesauruses-pictures-and-press-releases/fore-4