Greek Strong's Lexicon

G2709

Lemma: καταχθόνιος

Transliteration: kat-akh-thon'-ee-os

Definition: from κατά and chthon (the ground); subterranean, i.e. infernal (belonging to the world of departed spirits)

KJV Definition: under the earth

Verse usage

Filipensenan 2:10 NASB
so that at the name of Jesus EVERY KNEE WILL BOW, of those who are in heaven and on earth and under the earth,