claustrophobic
Definitions
Having an extreme or irrational fear of confined places.
Relating to or causing a feeling of being trapped or restricted in a small space.
Examples
The small, windowless elevator made me feel incredibly claustrophobic.
He avoided the crowded subway train because his claustrophobic tendencies made him anxious in tight spaces.
Living in such a tiny apartment started to feel claustrophobic after a few months.
Synonyms
confined cramped suffocating tight constricted closed-in stifling