Abysses

noun

1. Hell; the bottomless pit; primeval chaos; a confined subterranean ocean.
2. (frequently figurative) A bottomless or unfathomed depth, gulf, or chasm; hence, any deep, immeasurable; any void space.
3. Anything infinite, immeasurable, or profound.
4. Moral depravity; vast intellectual or moral depth.
5. An impending catastrophic happening.