trench

(noun) a ditch dug as a fortification having a parapet of the excavated earth.

(noun) a long steep-sided depression in the ocean floor. Synonyms: deep, oceanic abyss.

(noun) any long ditch cut in the ground.

(verb) impinge or infringe upon. Synonyms: impinge, encroach, entrench. Examples: "This impinges on my rights as an individual." "This matter entrenches on other domains."

(verb) fortify by surrounding with trenches. Examples: "He trenched his military camp."

(verb) cut or carve deeply into. Examples: "Letters trenched into the stone."

(verb) set, plant, or bury in a trench. Examples: "Trench the fallen soldiers." "Trench the vegetables."

(verb) cut a trench in, as for drainage. Synonyms: ditch. Examples: "Ditch the land to drain it." "Trench the fields."

(verb) dig a trench or trenches. Examples: "The national guardsmen were sent out to trench."