ἀντίφρασις
From LSJ
μηδέ μοι ἄκλαυστος θάνατος μόλοι, ἀλλὰ φίλοισι καλλείποιμι θανὼν ἄλγεα καὶ στοναχάς → may death not come to me without tears, but when I die may I leave my friends with sorrow and lamentation
English (LSJ)
εως, ἡ, (ἀντιφράζω) Rhet. and Gramm.,
A antiphrasis, i.e. the use of words of good sense in place of those of a contrary sense, Εὐμενίδες for Ἐρινύες, πόντος εὔξεινος for ἄξεινος, Ath.3.90b; or οὐδ' ἄρα . . γήθησεν for ἐλυπήθη, Trypho Trop.2.15; κατ' ἀντίφρασιν Corn.ND4, Erot.s.v. ἀσήμοις, Herm.in Phdr.p.176A., Porph.Chr. 87. II expression by means of negation, Anon.Fig.p.212S.