Strong's Concordance G2709

Original Word: καταχθόνιος
Transliteration: katachthónios
Phonetic Spelling: kat-akh-thon'-ee-os
[καταχθόνιος] from G2596 and χθών (the ground); subterranean, i.e. infernal (belonging to the world of departed spirits)

Usages throughout the bible

Philippians 2:10 - That at the name of Jesus every knee should bow, of things in heaven, and things in earth, and things under the earth; G2709