ὁμηρεύειν

From LSJ

ὄρνιθι γὰρ καὶ τὴν τότ᾽ αἰσίῳ τύχην παρέσχες ἡμῖν → for it was by a good omen that you provided that past fortune to us

Source

Greek > English (Woodhouse Verbs Reversed)

(see also ὁμηρεύω): be a hostage, take as a hostage