Nether
Part of speech: adjective
Definition: Lower; under. Lying or conceived as lying beneath the earth's surface.
Chthonian
Part of speech: adjective
Definition: Pertaining to the underworld; being beneath the earth.
Nether as an adjective is lower; under. while Chthonian as an adjective is pertaining to the underworld; being beneath the earth.
Part of speech: adjective
Definition: Lower; under. Lying or conceived as lying beneath the earth's surface.
Part of speech: adjective
Definition: Pertaining to the underworld; being beneath the earth.
We hope you now know whether to use Nether or Chthonian in your sentence.