ὄρει

From LSJ

μὴ κακὸν εὖ ἔρξῃς· σπείρειν ἴσον ἔστ' ἐνὶ πόντῳ → do no good to a bad man; it is like sowing in the sea

Source

Russian (Dvoretsky)

ὄρει: в сложн. словах = ὄρος.