English
foilable
From foil + -able.
Formed from foil + -able
Proto-Italic *foljom
…
Late Latin folia ‘a leaf’
Old French fueille ‘plant leaf’
Middle French fueille
Middle English foyle ‘a leaf’
English foil
Today it means
adj Capable of being foiled.
Language periods are conventional ranges, not dates for this word.
Etymograph / foilable