entrench
Cross references: 1. trespass en.trench \in-'trench\ \-m*nt\ vt 1a: to place within or surround with a trench esp. for defense 1b: to place (oneself) in a strong defensive position 1c: to establish solidly : CONFIRM 2: to cut into : FURROW; specif : to erode downward so as to form a trench 1: to dig or occupy a trench for defensive purposes 2: ENCROACH - used with on or upon - en.trench.ment n