διάψυξις
From LSJ
πάντα χωρεῖ καὶ οὐδὲν μένει καὶ δὶς ἐς τὸν αὐτὸν ποταμὸν οὐκ ἂν ἐμβαίης → all things move and nothing remains still, and you cannot step twice into the same stream
English (LSJ)
εως, ἡ,
A cooling, Plu.2.967f (pl.), Aët.5.44.
Greek (Liddell-Scott)
διάψυξις: ἡ, ψύχρανσις, δρόσισμα, Πλούτ. 2. 967F.