I think you are looking for "cul de sac".
un cul-de-sac (literallly "bag's end") is a dead end street or situation in French.
a dead end road in french is called CUL DE SAC and u cansometimes see this in england
Cul de sac means a court(yard) it is a dead end street.
In French it doesn't mean anything, but in Breton it means - dead.
A dead end street ( the end of a bag)
dead end
In French it means "bottom of the sack" and a cul-de-sacis a road or street with a dead end, and only one way in or out.
'You are French'. If there is a question mark on the end, it would mean 'You are French?' or 'Are you French?'
If you mean a dead end street, that's known as "callejón sin salida".
It can mean - the end or something that is very clever or fine or thin
'une impasse' or 'un cul-de-sac'
This means that the path, road or trail that you are on hits an end, it goes no where.