μὴ κακὸν εὖ ἔρξῃς· σπείρειν ἴσον ἔστ' ἐνὶ πόντῳ → do no good to a bad man; it is like sowing in the sea
P. πρατήρ, ὁ.
in compounds: use πώλης, e. g., perfume seller: P. μυροπώλης, ὁ.