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Καταπορθμίας

From LSJ

Ἓν οἶδα, ὅτι οὐδὲν οἶδα → I know only one thing, that I know nothing | all I know is that I know nothing.

Diogenes Laertius, Lives of the Philosophers, Book 2 sec. 32.

Russian (Dvoretsky)

Καταπορθμίας: ου ὁ (sc. ἄνεμος) катапортмий, восточный ветер (дующий в Сицилии со стороны Мессанского пролива) Arst.