"trenches" in the noun sense
a ditch dug as a fortification having a parapet of the excavated earth
2. trench, deep, oceanic abyss
a long steep-sided depression in the ocean floor
any long ditch cut in the ground
"trenches" in the verb sense
1. impinge, encroach, entrench, trench
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"
5. trench, ditch
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"
Source: WordNet® (An amazing lexical database of English)
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