εὔτονον

From LSJ

Ὅτι οὐδὲν ἧττον τὰ αὐτὰ ποιήσουσι, κἂν σὺ διαρραγῇς → You may break your heart, but men will still go on as before

Source

Russian (Dvoretsky)

εὔτονον: τό Plat., Arst. = εὐτονία.