moat
US /moʊt/
UK /moʊt/

1.
foso
a deep, wide ditch surrounding a castle, fort, or town, typically filled with water and intended as a defense against attack
:
•
The ancient castle was protected by a wide moat.
El antiguo castillo estaba protegido por un amplio foso.
•
They had to cross the moat to enter the fortress.
Tuvieron que cruzar el foso para entrar en la fortaleza.
1.
rodear con un foso
to surround (a place) with a moat
:
•
The engineers planned to moat the entire perimeter of the new defense facility.
Los ingenieros planearon rodear con un foso todo el perímetro de la nueva instalación de defensa.
•
The villagers decided to moat their settlement to deter invaders.
Los aldeanos decidieron rodear con un foso su asentamiento para disuadir a los invasores.