Intrenchment

n.	1.	The act of intrenching or the state of being intrenched.
	2.	(Mil.) Any defensive work consisting of at least a trench or ditch and a parapet made from the earth thrown up in making such a ditch. On our side, we have thrown up intrenchments on Winter and Prospect Hills. - Washington.
	3.	Any defense or protection.
	4.	An encroachment or infringement. The slight intrenchment upon individual freedom. - Southey.

Noun

1.

intrenchment - an entrenched fortification; a position protected by trenches Synonyms: entrenchment

entrenchment, fortification, munition, retrenchment, trench