foil

nouns

a piece of thin and flexible sheet metal
"the photographic film was wrapped in foil"
is derived from
is derived from
is a type of (narrower)
sheet of metal formed into a thin plate
anything that serves by contrast to call attention to another thing's good qualities
"pretty girls like plain friends as foils"
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"
picture consisting of a positive photograph or drawing on a transparent base; viewed with a projector
a light slender flexible sword tipped by a button
domain category
the art or sport of fighting with swords (especially the use of foils or epees or sabres to score points under a set of rules)
is a type of (narrower)
a sword used in the sport of fencing

verbs

enhance by contrast
"In this picture, the figures are foiled against the background"
is a type of (narrower)
to show differences when compared; be different
"the students contrast considerably in their artistic abilities"
hinder or prevent (the efforts, plans, or desires) of
"What ultimately frustrated every challenger was Ruth's amazing September surge"; "foil your opponent"
is derived from
cover or back with foil
"foil mirrors"
is a type of (narrower)
provide with a covering or cause to be covered
"cover her face with a handkerchief"; "cover the child with a blanket"; "cover the grave with flowers"