trench

A deep furrow or ditch.

A long narrow ditch embanked with its own soil and used for concealment and protection in warfare.

A long, steep-sided valley on the ocean floor.

To dig or make a trench or trenches in (land or an area, for example).

To place in a trench.

To dig a trench or trenches.

To encroach. Often used with on or upon.

To verge or border. Often used with on or upon.

To cut, as a notch, hole, mark, etc.; form by cutting; carve; incise.

To cut into; form a ditch, trench, or other linear depression in: as, to trench the ground round a camp or a fort.