General Synonyms:
* Confined
* Imprisoned
* Entangled
* Stuck
* Held captive
* Enclosed
* Snared
* Caught
More Specific Synonyms:
* Stranded (implies being in a remote or isolated location)
* Boxed in (implies being physically constricted)
* Hemmed in (implies being surrounded by something)
* Cornered (implies being in a difficult or dangerous situation)
* Immobilized (implies being unable to move)
* Ensnared (implies being caught in a trap or something that restricts movement)
Figurative Synonyms:
* Bound
* Tied down
* Held hostage
* In a bind
* At a standstill
* In a rut
The best synonym to use will depend on the specific situation and the nuance you want to convey.