WordWeb Online

1. Dug in
    
2. Established firmly and securely
   "the entrenched power of the nobility"

1. Fix firmly or securely
   - intrench
    
2. Have a negative effect on, esp. by somehow restricting; infringe upon
   "This matter entrenches on other domains";
   - impinge, encroach, trench [archaic]
    
3. Occupy a trench or secured area
   "The troops entrenched for the night";
   - dig in

See also: constituted, established, invulnerable

Type of: fasten, fix, secure, take advantage, trespass

Encyclopedia: Entrenched