claustrophobic
🇺🇸
/ˌklɔːstrəˈfəʊbɪk/
🇬🇧
/ˌklɒstrəˈfəʊbɪk/
causing a feeling of anxiety because of being in a confined space
The small, windowless room felt claustrophobic to me.
a person who has a fear of confined spaces
Claustrophobics often feel anxious in crowded places or small rooms.