ὁρκόω · horkoō — LSJ
make one swear, bind by oath, Cratin. 366, Ar. Th. 276, Lys. 20.26 : folld. by fut. inf., ὁρκώσαντες πίστεσι μεγάλαις μηδὲν μνησικακήσειν Th. 4.74; ὁ. τινὰ ἦ μὴν ἐμμενεῖν Is. 5.33 ; ὁ. τινὰς εἴς τινα Plu. Galb. 10: c. acc. cogn., ὁ. τοὺς στρατιώτας τοὺς μεγίστους ὅρκους Th. 8.75, cf. Ar. Lys. 187:—Pass., to be bound by oath, Polem.Hist. 83 ; cf. ὁρκίζω.
abs., administer an oath, IG 1(2).39.36 : c. acc., Ἀθηναίους ib. 16, cf. SIG 45.20 (Halic., v B. C.).