δυσέκπλυντος
From LSJ
κρεῖττον εἶναι φιλοσόφως ἀποθανεῖν ἢ ἀφιλοσόφως ζῆν → that it is better to die in manner befitting a philosopher than to live unphilosophically
German (Pape)
[Seite 678] oder besser δυσέκπλυτος, schwer auszuwaschen, Plut. frat. am. 17 u. a. Sp.
Spanish (DGE)
-ον
difícil de purgar ὕλη ref. los humores de una herida, Alex.Aphr.Pr.4.36.