subterranean
From LSJ
Ἐς δὲ τὰ ἔσχατα νουσήματα αἱ ἔσχαται θεραπεῖαι ἐς ἀκριβείην, κράτισται → But for extreme illnesses, extreme remedies, applied with severe exactitude, are the best (Hippocrates, Aphorism 6)
English > Greek (Woodhouse)
adj.
P. κατάγειος, V. κατασκαφής, κατῶρυξ.
Nether: P. and V. χθόνιος (Plat. but rare P.), V. νέρτερος.
Subterranean passage: P. ὑπόνομος, ὁ; see underground.