catachthonian

== English == === Etymology === Borrowed from Ancient Greek καταχθόνιος (katakhthónios) + -ian. === Pronunciation === (Received Pronunciation) IPA(key): /ˌkætəkˈθəʊ.ni.ən/ (General American) IPA(key): /ˌkætəkˈθoʊ.ni.ən/ Rhymes: -əʊniən === Adjective === catachthonian (not comparable) (rare) of or relating to the underworld