名詞 dead end:

1. a passage with access only at one end
   同義詞：cul, cul de sac
2. a situation in which no progress can be made or no advancement is possible
   同義詞：deadlock, impasse, stalemate, standstill

形容詞 dead end:

1. lacking opportunities for development or advancement
   同義詞：dead-end

1. My job is a dead end; I just work in the stores and there's absolutely no prospect of promotion.
   我的工作沒有前途，我只是在倉庫工作，因而絕對沒有晉升的指望。