βῠθ-ιος · byth-ios — LSJ
in the deep, sunken, of the deep
in the deep, sunken, Luc. DMar. 3.1; κρηπῖδας β. πηξαμένη AP 9.791 (Apollonid.); ἐκ β. ἰλύος from the mud of the deep, Hymn.Is. 71.
II in, of the sea, water animals, Poseidon, fishery
in or of the sea, τὰ β. (sc. ζῷα) water animals, AP 6.182 (Alex.Magn.); β. Κρονίδης Poseidon, Luc. Epigr. 34 [? AG 6.164]; τέχνη fishery, Opp. H. 3.15.
III deep, in the deep, abysmal
metaph., deep, βύθιόν τι καὶ δεινὸν φθέγγεσθαι Plu. Crass. 23; β. διάνοια Ph. 1.194 (but ἕως ἂν λογισμὸς β. οἴχηται vanishes in the deep, ib. 639, cf. Nonn. D. 2.55); abysmal, Dam. Pr. 106.