Lexical Definition

‎ὀμνύω‎ omnýō (om-noo'-o) to swear ^G:V
a prolonged form of a primary, but obsolete , for which another prolonged form is used in certain tenses

swear.

• to swear, i.e. take (or declare on) oath

Abbott-Smith

ὀμνύω (so Hdt. and some Att. writers) and ὄμνυμι (so generally in Att. prose and always in Trag.; Mk 14:71, -ύναι), [in LXX chiefly for שׁבע ni.;]
to swear, affirm by oath: Mt 26:74, Mk 14:71, He 7:21; seq. εἰ (q.v.), He 3:11 4:3; c. dat. pers., Mk 6:23; id. c. inf., He 3:18; seq. ὅρκῳ, Ac 2:30; ὀ. ὅρκον πρός, c. acc. pers. (cl.), Lk 1:73; c. acc. (of that by which one swears; cl., v. MM, xviii), Ja 5:12; seq. κατά, c. gen. (LXX; Bl., § 34, 1), He 6:13, 16; seq. ἐν (εἰς), as in Heb. (Bl., § 39, 4), Mt 5:34, 36 23:16, 18, 20-22, Re 10:6 (Bl., § 70, 3).†

Abbott-Smith References

Liddell-Scott-Jones

ὄμνυμι,

[Refs 5th c.BC+]; imperative ὄμνῠθι [Refs 8th c.BC+]; 3rd.pers. singular ὀμνύτω [Refs]; 3rd.pers. plural ὀμνύντων. Foed. cited in [Refs 5th c.BC+]: imperfect ὤμνυν [Refs 5th c.BC+]: also (from present ὀμνύω) 3rd.pers. singular imperative ὀμνῠέτω [Refs 8th c.BC+]; participle ὀμνύουσα [Refs 4th c.BC+]: imperfect ὤμνῠον [Refs 8th c.BC+] (for present indicative the Trag. and [Refs 5th c.BC+] which also occurs in Comedy texts, [Refs 5th c.BC+]: future ὀμοῦμαι, εῖ, εῖται, [Refs 8th c.BC+]; Doric dialect 1st pers. plural ὀμιώμεθα [Refs 5th c.BC+]; later future ὀμόσω [Refs 1st c.AD+]: aorist ὤμοσα [Refs 8th c.BC+]; Epic dialect ὤμοσσα [Refs 8th c.BC+]: perfect ὀμώμοκα [Refs 5th c.BC+]: pluperfect ὠμωμόκειν [Refs 5th c.BC+]:—middle, [Refs 2nd c.AD+], aorist participle ὀμοσάμενος [Refs 3rd c.BC+]:—passive, future ὀμοσθήσομαι [Refs 5th c.BC+]: aorist ὠμόσθην [Refs 5th c.BC+]: perfect 3rd.pers. singular ὀμώμοται [Refs 5th c.BC+]; 3rd.pers. plural ὀμώμονται Legal cited in [Refs 5th c.BC+]; participle ὀμωμοσμένος [Refs 4th c.BC+]:—swear, with accusative cognate, ὀμνυέτω δέ τοι ὅρκον [Refs 8th c.BC+]:—passive, ὀμώμοται γὰρ ὅοκος ἐκ θεῶν [Refs 4th c.BC+]

__II swear to a thing, affirm or confirm by oath,
__II.1 followed by accusative, ταῦτα δ᾽ ἐγὼν ἐθέλω ὀμόσαι [Refs 8th c.BC+]; ὄ. τὰς σπονδάς Foed. cited in [Refs 5th c.BC+]
__II.2 followed by future infinitive, swear that one will.., [Refs 8th c.BC+] (present infinitive, [Refs 4th c.BC+] preceding the infinitive, καί μοι ὄμοσσον ἦ μέν μοι.. ἀρήξειν [Refs 8th c.BC+]aorist infinitive and ἄν, [Refs]: by present infinitive, swear that one does.., [Refs 5th c.BC+]: by perfect infinitive, swear that one has.., [Refs 5th c.BC+]: by aorist infinitive, swear that one did.., ὀμνύουσι μὴ 'κπιεῖν ἀλλ᾽ ἢ μίαν <b>__II.3</b> <i>absolutely</i>, <span class='asgreek'>εἶπον</span> <span class='asgreek'>ὀμόσας</span> <span class='asgreek'>ἄν</span> I would have <b>given my word of honour,</b> [<a href="javascript:void(0)" title=" 5th-6th c.BC: Plato Philosophus “Symposium” 215d. ">Refs 5th c.BC+</a>] <b>__III</b> with <i>accusative</i> of the person or thing sworn by, <b>swear by,</b> <span class='asgreek'>νῦν</span> <span class='asgreek'>μοι</span> <span class='asgreek'>ὄμοσσον</span> <span class='asgreek'>ἀάατον</span> <span class='asgreek'>Στυγὸς</span> <span class='asgreek'>ὕδωρ</span> [<a href="javascript:void(0)" title=" 8th c.BC: Ilias Homerus Epicus “Illiad” 14.271; γαιήοχον ἐννοσίγαιον ὄμνυθι 23.585, compare 15.40, 5th c.BC: Herodotus Historicus 5.7, 4th-5th c.BC: Aeschylus Tragicus “Septem contra Thebas” 529, 5th c.BC: Sophocles Tragicus “Trachiniae” 1185, etc.; ὀμωμοκὼς τοὺς θεούς 4th c.BC: Demosthenes Orator 18.217 ">Refs 8th c.BC+</a>]; <span class='asgreek'>ὄμνυμι</span> <span class='asgreek'>θεοὺς</span> <span class='asgreek'>καὶ</span> <span class='asgreek'>θεάς</span> followed by <i>infinitive</i>, [<a href="javascript:void(0)" title=" 5th-6th c.BC: Xenophon Historicus “Anabasis” 6.6.17, compare 6.1.31: rarely with _dative_, τῷ γὰρ ὄμνυτ᾽">Refs 5th c.BC+</a>]; <span class='asgreek'>ἢ</span> <span class='asgreek'>σιδαρέοισ</span>; [<a href="javascript:void(0)" title=" 5th-6th c.BC: Aristophanes Comicus “Nubes” 248: in Prose also with Preps., ὀ. καθ᾽ ἱερῶν τελείων Legal cited in 5th-6th c.BC: Andocides Orator 1.97, 5th c.BC: Thucydides Historicus 5.47; κατ᾽ ἐξωλείας 4th c.BC: Demosthenes Orator 21.119; κατὰ τῆς Πολιάδος 2nd c.AD: Lucianus Sophista “Symp.” 32; εἰς τὸν Οὐιτέλλιον 1st-2nd c.AD: Plutarchus Biographus et Philosophus “Otho” 18; ἐπὶ τῶν ἱερῶν 2nd c.BC: Polybius Historicus 38.20.5; ἐν Κυρίῳ LXX.Judg.21.7; ἐν τῷ ναῷ NT.Matt.23.16:—">NT+5th c.BC+</a>]<i>passive</i>, <span class='asgreek'>ὀμώμοσται</span> <span class='asgreek'>Ζεύς</span> Zeus <b>has been sworn by, adjured,</b> [<a href="javascript:void(0)" title=" 5th c.BC: Euripides Tragicus “Rhesus” 816, compare 5th-6th c.BC: Aristophanes Comicus “Nubes” 1241. ">Refs 5th c.BC+</a>]" class="external-link">Refs 5th c.BC+

_{LSJ Scripture Refs: LXX.Judg.21.7 ☩ Matt.23.16}