G2709
καταχθόνιος
subterranean
κατα-χθόνιος, -ον (χθών, the earth), subterranean, under the earth (in cl., of the infernal gods): of the departed in Hades, opposite to ἐπουράνιος, ἐπίγειος, Php.2:10.† (AS)
The KJV translates G2709 in the following manner:
earth (2x)
Full Thayer's lexicon entry
καταχθόνιος — katachthónios
καταχθόνιος, καταχτονιον (κατά (see κατά, III. 3), χθών (the earth)), subterranean, Vulg.infernus: plural, of those who dwell in the world below, i. e. departed souls (cf. Winers Grammar, § 34, 2; but others make the adjective a neuter used indefinitely; see Lightfoot, in the place cited), Php 2:10. (Homer, Dionysius Halicarnassus, Anthol., etc., Inscriptions)
1 occurrence