Where does “chthonius” come from?

chthonius (Latin) comes from Ancient Greek χθόνιος, from Ancient Greek -ῐος, from Proto-Indo-European -yós — Creates adjectives from noun or verb stems.

chthonius (Latin): underworldly, chthonian, chthonic

Definitions

underworldly, chthonian, chthonic

Ancestry of “chthonius”, step by step

Step	Language	Word	Meaning
1	Ancient Greek	χθόνιος	underground, subterranean, chthonian
2	Ancient Greek	-ῐος	belonging to; of”, “belonging to”, “pertaining to
3	Proto-Indo-European	-yós	Creates adjectives from noun or verb stems

Words derived from “chthonius”

ctonio
Tyrannochthonius

Every word from Proto-Indo-European -yós →Every word from Ancient Greek -ῐος →Every word from Ancient Greek χθόνιος →