foil
US /fɔɪl/
UK /fɔɪl/

1.
papel de aluminio, papel de plata
a thin sheet of metal, especially aluminum, used for wrapping food
:
•
Wrap the leftovers tightly in aluminum foil.
Envuelve bien las sobras en papel de aluminio.
•
She covered the dish with foil before putting it in the oven.
Cubrió el plato con papel de aluminio antes de meterlo al horno.
2.
contrapunto, contraste
a person or thing that contrasts with and so emphasizes and enhances the qualities of another
:
•
The quiet, thoughtful character served as a perfect foil to the impulsive protagonist.
El personaje tranquilo y reflexivo sirvió como un perfecto contrapunto para el protagonista impulsivo.
•
His dry wit was a good foil for her exuberant personality.
Su ingenio seco era un buen contrapunto para su personalidad exuberante.
3.
florete
a light, slender sword with a blunt point, used for fencing
:
•
He practiced his lunges with a fencing foil.
Practicó sus estocadas con un florete de esgrima.
•
The fencer saluted with his foil before the match began.
El esgrimista saludó con su florete antes de que comenzara el partido.
1.
frustrar, desbaratar
prevent (something undesirable) from succeeding
:
•
The police managed to foil the bank robbery.
La policía logró frustrar el robo al banco.
•
Their plans were foiled by unexpected bad weather.
Sus planes fueron frustrados por un clima inesperado.