πέλαγος
Alt. πέλα^γος, ος, εος, τό,
I. "the sea", esp. "the high sea, open sea, the main", Lat. pelagus, Hom., etc.; joined with other words denoting "sea", ἁλὸς ἐν πελάγεσσιν (cf. "aequora ponti)", Od.; πόντιον π. or πόντου π., Pind.; ἅλς πελαγία Aesch.; ἅλιον π. Eur.: often of parts of the sea (θάλασσα), Αἰγαῖον π. Aesch.; ἐκ μεγάλων πελαγῶν, τοῦ τε Τυρσηνικοῦ καὶ τοῦ Σικελιοῦ Thuc.
II. metaph., of any vast quantity, π. κακῶν a ""sea" of troubles, " Aesch.; π. δύης id=Aesch.; εἰς τὸ π. τῶν λόγων Plat.; also of great difficulties, Soph.