moat

A deep wide ditch, usually filled with water, typically surrounding a fortified medieval town, fortress, or castle as a protection against assault.

A ditch similar to one surrounding a fortification.

To surround with or as if with a moat.

To surround with a ditch for defense; also, to make or serve as a moat for.

An obsolete spelling of mote.

A mound; a hill.

In fortification, a ditch or deep trench dug round the rampart of a castle or other fortified place, and often filled with water.

A building; dwelling; abode.

In mining, to puddle; cover with earth so as to exclude air, as a mine shaft in case of an underground fire.

To surround with a moat.