This is the 6229th most frequent Russian word.
тупик
"Тупик" – dead end.
Used literally, 'тупик' refers to a physical dead-end or cul-de-sac.
Птица залетела в тупик за домом.
The bird flew into the dead-end behind the house.
Here, 'тупик' is used metaphorically to describe a situation without progress or resolution.
Эти переговоры зашли в тупик.
These negotiations have reached a deadlock.
This usage is similar to the first, indicating a literal dead-end in a physical path.