sir
From LSJ
Μετὰ τὴν δόσιν τάχιστα γηράσκει χάρις → Post munera cito consenescit gratia → Gleich nach der Gabe altert äußerst schnell der Dank
English > Greek (Woodhouse)
substantive
in addressing a man: P. and V. ἄνθρωπε.
my good sir: P. and V. ὦ τᾶν, P. ὦ γενναῖε, Ar. and P. ὦ δαιμόνιε.