Pertaining to the earth; earthy; as, chthonic religions.

gods: gods who inhabit the earth or live within it, determining sudden variations in the nature such as earthquakes, volcanic eruptions, draughts. Chthonic (pronounced THON-ick) means earthbound.

of the underworld; "nether regions"

(15) -- an adjective meaning "of the earth" and often referring to the gods of the underworld (Pedley, 353)

dwelling in or beneath the earth; used in reference to the gods of the underworld

(also chthonian) from Greek chthon: earth. Dwelling in or under the earth, related to the underworld or the world of the dead, but also with fertility and crops

Jung's term for anything dark, earthy and close to nature.