ἐπιθαλάσσιος
From LSJ
ψυχῆς πείρατα ἰὼν οὐκ ἂν ἐξεύροιο πᾶσαν ἐπιπορευόμενος ὁδόν· οὕτω βαθὺν λόγον ἔχει → one would never discover the limits of soul, should one traverse every road—so deep a measure does it possess
English (LSJ)
Att. ἐπιθαλάττιος, α, ον Pl.Lg.704d, PRev.Laws93.5 (iii B.C.), also ος, ον X.HG3.1.16:—
A lying or dwelling on the coast, Hdt.1.154; τὰ ἐ. Id.5.30; ἐ. τῆς Πελοποννήσον Th.2.56; marine, Epich.90:—in App.Hisp. 12 ἐπιθάλασσος is prob. f.l.
German (Pape)
[Seite 942] att. -ττιος, am Meere gelegen, Her. 5, 30; von Menschen, am Meere wohnend, 1, 154; χωρία, πόλισμα, Thuc. 2, 66. 3, 7; Xen. An. 5, 5, 23; αἱ ἐπιθαλάττιοι πόλεις Hell. 3, 1, 16; Folgde; auch dreier Endungen, Plat. Legg. IV, 704 d.