batho- + -phobia
- The fear of volumes with large depths such as stairways and deep caves.
- The fear of depths
2004, Michael A. Gibbs, A Fairy of Anneliese Glade, ISBN 1 58939 598 0:
- "You're afraid of the dark. That's nyctophobia. And you're afraid of deep places, or depth. That's bathophobia."