chthonian

Etymology
From, from.

Adjective

 * 1) Pertaining to the underworld; being beneath the earth.

Derived terms

 * chthonian planet

Translations

 * French:
 * Greek:
 * Ancient: χθόνιος
 * Polish: chtoniczny
 * Russian:

Noun

 * 1) A dweller in the mythical underworld.