ὕπνος δεινὸν ἀνθρώποις κακόν → sleep is a terrible evil for humans (Menander, Sententiae monostichoi 1.523)
organ of sight, hearing, etc.: P. ὄργανον, τό (Plato, Theaetetus 185A).
faculty: P. δύναμις, ἡ.