δολιχόν

From LSJ

τὸ μὴ γὰρ εἶναι κρεῖσσον ἢ τὸ ζῆν κακῶς → for it is better not to exist than to live in misery

Source

Russian (Dvoretsky)

δολῐχόν: adv. долго Hom., Plat.