| noun | a piece of thin and flexible sheet metal “the photographic film was wrapped in foil” |
| noun | anything that serves by contrast to call attention to another thing's good qualities “pretty girls like plain friends as foils” |
| noun | a device consisting of a flat or curved piece (as a metal plate) so that its surface reacts to the water it is passing through “the fins of a fish act as hydrofoils” |
| noun | picture consisting of a positive photograph or drawing on a transparent base; viewed with a projector |
| noun | a light slender flexible sword tipped by a button |
| verb | enhance by contrast “In this picture, the figures are foiled against the background” |
| verb | hinder or prevent (the efforts, plans, or desires) of “What ultimately frustrated every challenger was Ruth's amazing September surge” |
| verb | cover or back with foil “foil mirrors” |
| foil | verb | cover or back with foil |
| foliate | verb | hammer into thin flat foils |
| enhance | verb | make better or more attractive |
| foil | noun | anything that serves by contrast to call attention to another thing's good qualities |
| thwarter | noun | someone who systematically obstructs some action that others want to take |
| thwarting | noun | an act of hindering someone's plans or efforts |
| foiling | noun | an act of hindering someone's plans or efforts |
| cross | noun | any affliction that causes great suffering |
| frustrative | adjective | preventing realization or attainment of a desire |
| frustration | noun | a feeling of annoyance at being hindered or criticized |