im·passe /ˈɪmˌpæs, ɪmˈ/
  難局,僵局,死路,死胡同
  Im·passe n.  An impassable road or way; a  blind alley; cul-de-sac; fig., a position or predicament affording no escape.
     The issue from the present impasse will, in all probability, proceed from below, not from above.    --Arnold White.
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  impasse
       n 1: a situation in which no progress can be made or no
            advancement is possible; "reached an impasse on the
            negotiations" [syn: deadlock, dead end, stalemate,
             standstill]
       2: a street with only one way in or out [syn: blind alley, cul
          de sac, dead-end street]