entrench (
http://definr.com/entrench)
v 1: fix firmly or securely [syn:
intrench]
2: impinge or infringe upon; "This impinges on my rights as an
individual"; "This matter entrenches on other domains"
[syn:
impinge,
encroach,
trench]
3: occupy a trench or secured area; "The troops dug in for the
night" [syn:
dig in]