1. Established firmly and securely
   "the entrenched power of the nobility"
    
2. Dug in
   "The entrenched soldiers were well-protected in their foxholes"

1. Establish or fix something so firmly it's difficult to change
   "The company had entrenched itself in the market";
   - intrench [archaic]
    
2. Occupy a trench or secured area
   "The troops entrenched for the night";
   - dig in
    
3. Have a negative effect on, esp. by somehow restricting; infringe upon
   "This matter entrenches on other domains";
   - impinge, encroach, trench [archaic]
    
4. Dig trenches for military defence; take up a strong defensive position
   "The soldiers entrenched their position on the hillside";
   - intrench [archaic]
    
5. [archaic] Invade or encroach upon rights or territory
   - intrench [archaic]

See also: constituted, established, invulnerable

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

Encyclopedia: Entrenched