stale relationship

Translations
застоявшиеся отношения
He felt trapped in a stale relationship.
Он чувствовал себя в ловушке застоявшихся отношений.
Definitions
A stale relationship refers to a romantic or interpersonal connection that has become unexciting, stagnant, or lacking in emotional engagement, often characterized by routine interactions and a lack of growth or intimacy.