claustrophobia
USklaw-struh-FOH-bee-uh/ˌklɔ.strəˈfoʊ.bi.ə/UKklos-truh-FOH-bee-uh/ˌklɒs.trəˈfəʊ.bi.ə/
- 1Fear of being in small, closed places, like a tiny room or an elevator.
My brother has claustrophobia, so he always takes the stairs instead of the elevator.
Her claustrophobia got worse when the train stopped in the dark tunnel.
Note
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Origin
From the Latin word claustrum, meaning "a shut-in place," plus -phobia, meaning "fear."