foil
foil
noun
A very thin sheet of metal, typically aluminium, used for wrapping food.
"Wrap the sandwiches in foil to keep them fresh."
verb
To prevent someone or something from succeeding in a plan or attempt.
"The police foiled the bank robbery attempt."
noun
A person or thing that makes another seem better or more prominent by contrast.
"Her calm nature was a perfect foil for his excitability."
Thesaurus
Synonyms: hydrofoil, spoil, bilk, cross, queer, scotch, frustrate, baffle, thwart, transparency, enhancer