To fortify something with a wall or rampart.
To provide protection of defense for something.
A defensive wall or rampart.
A defense or safeguard.
A breakwater.
Any means of defence or security.
The planking or plating along the sides of a nautical vessel above her gunwale that reduces the likelihood of seas washing over the gunwales and people being washed overboard.
To unintentionally leave something behind.
To lose remembrance of.
To unintentionally not do, neglect.
To cease remembering.
Euphemism for fuck, screw (a mild oath).