Oldtimer
Explorer
Thank you for clearing that up for me.Cul-de-sac is not rude at all. An impasse is a road/pathway that leads to the end of the road; a cul-de-sac doesn’t have to be a pathway, you could be in a labyrinth, in a cave, or anywhere you’ve taken the wrong turn to get to your destination. In other words an impasse is always a cul-de-sac, the reverse is not true. In practice they are considered synonymous.
Indeed, dead end in my understanding fits both translations.