ἀποκάθαρσις
From LSJ
Ἐς δὲ τὰ ἔσχατα νουσήματα αἱ ἔσχαται θεραπεῖαι ἐς ἀκριβείην, κράτισται → For extreme diseases, extreme methods of cure, as to restriction, are most suitable.
English (LSJ)
εως, ἡ,
A purging: hence, of dross, Arist.Mete.383b4, cf. Str.4.2.1; of animal secretions, Arist.GA726a13, cf. HA587b1; ἀποκαθάρσεις χολῆς Th.2.49. 2 cleansing, πνεύματος Gp.12.22.11; sifting of grain, PRev.Laws 39.10 (iii B.C.), PLond.ined.2361r (iii B.C.). II lustration, expiation, Plu.Rom.21, Iamb.Comm.Math.15; νείκους Hierocl.in CA24p.473M.