less common spelling of entrench
1a : to place within or surround with a trench especially for defenseb : to place (oneself) in a strong defensive positionc : to establish solidly <entrenched themselves in the business>
2 : to cut into : furrow; specifically : to erode downward so as to form a trench
1 : to dig or occupy a trench for defensive purposes
2 : to enter upon or take over something unfairly, improperly, or unlawfully : encroach —used with on or upon
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