am·bush /ˈæmˌbʊʃ/
  埋伏,伏兵,伏擊(vt.)埋伏,伏擊(vi.)埋伏
  Am·bush n.
  1. A disposition or arrangement of troops for attacking an enemy unexpectedly from a concealed station. Hence: Unseen peril; a device to entrap; a snare.
  Heaven, whose high walls fear no assault or siege
  Or ambush from the deep.   --Milton.
  2. A concealed station, where troops or enemies lie in wait to attack by surprise.
     Bold in close ambush, base in open field.   --Dryden.
  3. The troops posted in a concealed place, for attacking by surprise; liers in wait. [Obs.]
     The ambush arose quickly out of their place.   --Josh. viii. 19.
  To lay an ambush, to post a force in ambush.
  Am·bush v. t. [imp. & p. p. Ambushed p. pr. & vb. n. Ambushing.]
  1. To station in ambush with a view to surprise an enemy.
  By ambushed men behind their temple laid,
  We have the king of Mexico betrayed.   --Dryden.
  2. To attack by ambush; to waylay.
  Am·bush, v. i. To lie in wait, for the purpose of attacking by surprise; to lurk.
     Nor saw the snake that ambushed for his prey.   --Trumbull.
  ◄ ►
  ambush
       n : the act of concealing yourself and lying in wait to attack
           by surprise [syn: ambuscade, lying in wait, trap]
       v 1: wait in hiding to attack [syn: scupper, bushwhack, waylay,
             lurk, ambuscade, lie in wait]
       2: hunt (quarry) by stalking and ambushing [syn: still-hunt]
  Ambush
     Joshua at the capture of Ai lay in ambush, and so deceived the
     inhabitants that he gained an easy victory (Josh. 8:4-26).
     Shechem was taken in this manner (Judg. 9:30-45. Comp. Jer.
     51:12).