μεταμέλεσθαι
From LSJ
κρεῖττον εἶναι φιλοσόφως ἀποθανεῖν ἢ ἀφιλοσόφως ζῆν → that it is better to die in manner befitting a philosopher than to live unphilosophically
Greek > English (Woodhouse Verbs Reversed)
(see also: μεταμέλομαι) be penitent, feel remorse
Lexicon Thucydideum
poenitere, to regret 4.27.2, 5.14.2, 5.35.4, 7.50.3, 8.92.10.