ἀόρατος
From LSJ
ὣς ὁ μὲν ἔνθ' ἀπόλωλεν, ἐπεὶ πίεν ἁλμυρὸν ὕδωρ → so there he perished, when he had drunk the salt water
English (LSJ)
ον,
A unseen, invisible, Pl.Phd.85e, etc.; ἀόρατος ὄψιν Alex.240.5; τραῦμ' ἀ., ἔρως APl.4.198 (Maec.); ἀ. τὸ μέλλον Isoc.1.29; τὸ ἀόρατον the unseen world, the unseen, ἐξ οὐρανοῦ καὶ τοῦ ἀ. Pl.Sph.246a, cf. Tht.155e, al.: τὰν ἀ. ἀτραπιτὸν βιότου obscure, Epigr.Gr.223 (Milet.); ἀ. κατὰ δόξαν Ath.12.511d; τὸν ἀ. ὡς ὁρῶν Ep.Hebr.11.27. Adv. -τως Ph.1.157, Placit.2.24.5. II Act., not having seen, without experience of, παντὸς κακοῦ, δεινοῦ, Plb. 2.21.2, 3.108.6: abs., Luc.Halc.3.