foil

FOIL noun

uk/fɔɪl/ us
[ U ] metal made into very thin sheets like paper and used mainly for covering food

фольга
UK aluminium foil / US aluminum foil  a foil for sb/sth
a person or thing that shows or emphasizes how different someone or something else is

контраст, фон foil verb [ T ] uk/fɔɪl/ us
to stop a crime, plan, etc from succeeding, or to stop someone doing what they want to do

предотвращать, срывать планы
[ often passive ] The plot was foil ed by undercover police officers. This device is designed to foil car thieves.