οιάω

From LSJ

πάτερ, ἄφες αὐτοῖς, οὐ γὰρ οἴδασιν τί ποιοῦσιν → father, forgive them, for they know not what they do

Source

Greek Monolingual

οἰάω (Ι) οίος (Ι)
(κατά τον Ησύχ.) «οἶός εἰμί, μονάζω».