foil
noun
- fencing weapon
- very thin sheet metal, usually made by hammering or rolling
- artistic representation of circular leaf shapes used in architecture
verb
- to prevent or defeat
Wiktionary
Pronunciation: /fɔɪl/
name
Etymology: Acronym of first outer inner last or similar.
- An acronym for the algorithm for multiplying two binomials.
noun
- A small arc in the tracery of a window, etc.
verb
Etymology: See file.
- To defile; to soil.