LATIN DICTIONARYLexicon Latīnum
English → Latin

“foil” in Latin

The English word foil itself goes back to Latin folium, through folia.

Riddle & Arnold A Copious and Critical English–Latin Lexicon, 1864

foil s.
A blunt sword for fencing, rudis (with the ancients, a thin rod for fencing): gladius praepilatus (like our own foils, after Hirt., B. Afr., 72): to fence with foils, batuere armis pugnatoriis (Suet., Cal., 54).
Tinsel, bractea (thin metal sheet, especially of gold; diminutive, *bracteola auri tremuli; Vid: Juv., 13, 152). To coat a red jewel with silver foil, gemmam rubram argentea bractea sublinere.
That which recommends anything by contrast with itself, perhaps vitium virtuti contrarium, or circumlocution To set off anything by a foil, *rei pulchritudinem ipsa alterius rei deformitate illuminare; or *virtutem aliquam contrarii exemplo vitii commendare.

Quick answer

What is the Latin word for foil?
The usual Latin words for “foil” are rudis, bractea. The right choice depends on the sense; see the distinctions below.

Entry from J. E. Riddle & T. K. Arnold, A Copious and Critical English–Latin Lexicon (rev. C. Anthon, New York: Harper, 1864), digitised by Fergus J. P. Walsh, CC BY-SA 4.0; Latin markup adapted by latindictionary.co.