Claustrophobia is a dread of being shut in small spaces. Suffer from claustrophobia, mild claustrophobia.
It is set off by the feeling of being unable to get out rather than by the size of the room. Claustrophobia in a scanner is common enough that hospitals plan for it.
1nounclaustrophobiaA dread of being shut in small spaces.
“His claustrophobia made the whole journey by ferry rather than tunnel.”
claustrophobia is a fear.
Latin claustrum, an enclosed place, plus Greek phobia, fear; the word first appears in a medical journal.
Proto-Indo-European
*(s)kleh₂w-
Latin
claustrum — a shut-in place
English, today
claustrophobia
From Latin claustrum (“a shut-in place”), from claudō + -phobia. First attested in the British Medical Journal.
Etymology from Wiktionary, CC BY-SA