läutern
From LSJ
Ἐς δὲ τὰ ἔσχατα νουσήματα αἱ ἔσχαται θεραπεῖαι ἐς ἀκριβείην, κράτισται → But for extreme illnesses, extreme remedies, applied with severe exactitude, are the best (Hippocrates, Aphorism 6)
German > Latin
läutern, I) eig.: purgare. – II) uneig., bessern, verbessern: emendare (z.B. animum, ingenium alcis).