καταχθόνιοςkatachthónios

subterranean, under the earth (in classical Greek, of the infernal gods): of the departed in Hades, opposed to ἐπουράνιος, ἐπίγειος, Philippians 2:10.

Greek (New Testament) · G2709

Same root

κατάkatá · G2596(prepositionally) down (in place or time), in varied relations (according to the case (genitive, dative or accusative) with which it is joined)

Where it appears

Appears 1 times in the Bible.

Philippians 2:10 that at the name of Jesus every knee should bow, in heaven and on earth and under the earth,

Source: G. Abbott-Smith, A Manual Greek Lexicon of the New Testament (1922), public domain.