The Stygian depths of the ocean held many mysteries.
shadows
Frequency:
50
%
The Stygian shadows seemed to dance in the moonlight.
realm
Frequency:
45
%
He journeyed into the Stygian realm of the underworld.
Idiomatic Expressions for Stygian
Phrase: Stygian depths
Meaning: the deepest, darkest parts of something
Usage: The submarine explored the Stygian depths of the ocean, discovering new species of fish.