BLIND ALLEY

Definition:

1. [noun] a street with only one way in or out
   Synonyms: cul de sac, dead-end street, impasse
   
   
2. [noun] (figurative) a course of action that is unproductive and offers no hope of improvement; "all the clues led the police into blind alleys"; "so far every road that we've been down has turned out to be a blind alley"
   
   

Synonyms:

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