trench - noun

a ditch dug as a fortification having a parapet of the excavated earth

a long steep-sided depression in the ocean floor

any long ditch cut in the ground

trench - verb

• impinge or infringe upon
• fortify by surrounding with trenches
• cut or carve deeply into
• set, plant, or bury in a trench
• cut a trench in, as for drainage
• dig a trench or trenches

trench - thesaurus

deep   ditch   encroach   entrench   impinge