What does "bathophobia" mean?

The fear of volumes with large depths such as stairways and deep caves.

How do you pronounce "bathophobia"?

Pronounced //ˌbæθəˈfəʊbiə//.

/ˌbæθəˈfəʊbiə/ noun

noun ·Rare ·Advanced level

Noun

1
The fear of volumes with large depths such as stairways and deep caves. uncountable
2
The fear of depths. uncountable
""You're afraid of the dark. That's nyctophobia. And you're afraid of deep places, or depth. That's bathophobia.""

""You're afraid of the dark. That's nyctophobia. And you're afraid of deep places, or depth. That's bathophobia.""

From batho- + -phobia.