ἀσκεῖν περὶ τὰ νοσήματα δύο, ὠφελεῖν ἢ μὴ βλάπτειν → strive, with regard to diseases, for two things — to do good, or to do no harm | as to diseases, make a habit of two things — to help, or at least, to do no harm
κατακολυμβῶ, -άω (Α)
κολυμπώ προς το βάθος, καταδύομαι («κατακολυμβῶσιν οἱ σπογγεῖς», Αριστ.).