cul-de-sac

cul-de-sac is a   Noun

Definition:

[1] A passage with only one outlet, as a street closed at one end; a blind alley; hence, a trap.

[2] a position in which an army finds itself with no way of exit but to the front.

[3] Any bag-shaped or tubular cavity, vessel, or organ, open only at one end.

Synonyms: