1) An entrenched fortification 2) An entrenched position 3) Fortification 4) Intrenchment 5) Munition 6) The act of entrenching 1) Intrenchment 2) Retrenchment 
Sunken tracks or grooves in the tread surface cut in the direction of travel by the passage of water or trail users.
A possible description of the actions of managers of firms. Managers can make investments that are more valuable under themselves than under alternative managers. Those investments might not maximize shareholder value. So shareholders have a moral hazard in contracting with managers. Or, in the phrasing of Weisbach (1988): 'Managerial entrench...
[n] - an entrenched fortification
noun an entrenched fortification; a position protected by trenches
the act of entrenching. · an entrenched position. · Usually,an earth breastwork or ditch for protection against enemy fire.