foil

/fɔɪl/
verb
  1. To prevent someone from succeeding or carrying out a plan; to thwart.
    • The security guard foiled the thief's attempt to break into the museum.
    • Quick thinking by the pilot foiled a potential disaster.
    • Her careful planning foiled all of their efforts to surprise her.
Antonyms
noun
  1. A very thin, flexible sheet of metal, used especially for wrapping food.
    • The baker covered the cake with a sheet of foil to keep it fresh.
    • Use heavy-duty foil when grilling vegetables to prevent them from burning.
    • She wrapped the leftover pizza in aluminum foil.
  2. A person or thing that contrasts with another, making the other's qualities more noticeable.
    • In the movie, the quiet hero is a perfect foil for the loud villain.
    • Her calm personality served as a foil to his energetic nature.
    • The dark background acted as a foil to make the bright colors stand out.
  3. A light, thin sword used in the sport of fencing.
    • Beginners in fencing usually start with a foil before moving to other swords.
    • The fencer's foil bent slightly as she struck her opponent.
    • He practiced his lunges with a foil at the fencing club.
What does "foil" mean? | whatsthatwordmean | whatsthatwordmean