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 press; urge; compel.
To use threats; act or speak menacingly; threaten.
A person or object that is regarded as a danger; a menace.
An indication of potential or imminent danger.
An expression of intent to injure or punish another.