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English definition of “foil”

foil

verb [T]
 
 
/fɔɪl/
to stop a crime, plan, etc from succeeding, or to stop someone doing what they want to do: [often passive] The plot was foiled by undercover police officers. This device is designed to foil car thieves.Preventing and impedingLimiting and restricting
(Definition of foil verb from the Cambridge Learners Dictionary © Cambridge University Press)
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