foil - definition and synonyms

verb [transitive] 

Your browser doesn’t support HTML5 audio

/fɔɪl/
present tense
I/you/we/theyfoil
he/she/itfoils
present participlefoiling
past tensefoiled
past participlefoiled
  1. to prevent someone from doing something that they are trying to do

    The escape attempt was foiled by wardens firing in the air.