trench

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

impinge or infringe upon

• “This impinges on my rights as an individual”
• “This matter entrenches on other domains”

fortify by surrounding with trenches

• “He trenched his military camp”

cut or carve deeply into

• “letters trenched into the stone”

set, plant, or bury in a trench

• “trench the fallen soldiers”
• “trench the vegetables”

cut a trench in, as for drainage

• “ditch the land to drain it”
• “trench the fields”

dig a trench or trenches

• “The National Guardsmen were sent out to trench”