English
foiler
From foil + -er.
Formed from foil + -er
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
noun One who foils or frustrates.
Language periods are conventional ranges, not dates for this word.
Etymograph / foiler