From Middle English forme (“shape, figure, manner, bench, frame, seat, condition, agreement, etc.”), from Old French forme, from Latin forma (“shape, figure, image, outline, plan, mold, frame, case, etc., manner, sort, kind, etc.”)
From Wiktionary
Middle English forme from Latin fōrma possibly (via Etruscan) from Greek morphē
From American Heritage Dictionary of the English Language, 5th Edition
New Latin -fōrmis from Latin fōrma form
From American Heritage Dictionary of the English Language, 5th Edition
OFr -forme < L forma, form
From Webster's New World College Dictionary, 5th Edition