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435 B
435 B
the bottomless pit
This is an extremely deep narrow hole. Possible meanings are 1) the pit has no bottom; it continues to go down further forever or 2) the pit is so deep that it is as if it had no bottom. See how you translated this in Revelation 9:1.
Abaddon ... Apollyon
Both names mean "Destroyer." (See: rc://en/ta/man/translate/translate-names and rc://en/ta/man/translate/translate-transliterate)