Foil etymology

English

English word foil comes from Latin folium, and later Old French fueille (Leaf (of a plant).)

Etymology of foil

Detailed word origin of foil

Dictionary entry Language Definition
folium Latin (lat) (figuratively) trifle, thing of no consequence. A leaf. A petal. A sheet or leaf of paper.
folia Latin (lat)
folia Late Latin (LL)
fueille Old French (fro) Leaf (of a plant).
foille Middle English (enm)
foil English (en) (fencing) A very thin sword with a blunted (or foiled) tip. (figuratively) Anything that acts by contrast to emphasise the characteristics of something.. (figuratively) In literature, theatre/theater, etc., a character who helps emphasize the traits of the main character.. (heraldiccharge) A stylized flower or leaf.. (uncountable) Thin aluminium/aluminum (or, formerly, tin) used for wrapping [...]