ἐπὶ τὰ χείρω καὶ ἐπὶ τὰ βελτίω → for worse or for better, for better or for worse
πᾰνύστᾰτον: adv. Soph., Eur. = πανύστατα.
for the very last time, Soph., Eur.; so πανύστατα Eur.
for the last time