bulwark
🇺🇸
/ˈbʊlwɜːrk/
🇬🇧
/ˈbʊlwək/
A strong support or protection for something.
The forest is a bulwark against soil erosion.
A defensive wall or structure.
The castle had a high bulwark to keep out invaders.
The part of a ship above the deck level.
The bulwark of the ship provided extra safety for the passengers.