intrenchment
  壕溝;堡壘;侵
  In·trench·ment 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.
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  intrenchment
       n : an entrenched fortification; a position protected by
           trenches [syn: entrenchment]