Lexical Definition

‎ἀρνέομαι‎ arnéomai (ar-neh'-om-ahee) to deny G:V
perhaps from ‎Α‎ (as a negative particle) and the middle voice of ‎ῥέω‎

deny, refuse.

Usage: 22 forms in 34 verses
Form Translated As     In Verse(s)
ἤρνηται he has denied 1Tim.5.8
ἠρνημένοι already denying 2Tim.3.5
ἠρνεῖτο he was denying Mark.14.70
ἠρνήσω denied Rev.3.8
you have denied Rev.2.13
ἠρνήσατο denied John.1.20John.18.25John.18.27
he denied Matt.26.70Matt.26.72Mark.14.68Luke.22.57
he refused Heb.11.24
ἠρνήσασθε denied Acts.3.14
disowned Acts.3.13
ἠρνήσαντο they rejected Acts.7.35
ἀρνοῦνται they deny Titus.1.16
ἀρνούμενοσ denying 1John.2.221John.2.22
is denying 1John.2.23
ἀρνούμενοι denying 2Pet.2.1Jude.1.4
ἀρνουμένων When is denying Luke.8.45
ἀρνησόμεθα we will deny 2Tim.2.12
ἀρνησάσθω he should deny Luke.9.23
ἀρνησάμενόσ having denied Luke.12.9
ἀρνησάμενοι having denied Titus.2.12
ἀρνεῖσθαι to deny Acts.4.16
ἀρνήσῃ you will deny John.13.38
ἀρνήσομαι will deny Matt.10.33
ἀρνήσηταί may deny Matt.10.33
ἀρνήσεται will deny 2Tim.2.12
ἀρνήσασθαι to deny 2Tim.2.13
ηρνήσατο denied LXX.Gen.18.15

Abbott-Smith

ἀρνέομαι, -οῦμαι, depon., [in LXX: Ge 18:15 (כּחשׁ pi.), Wi 12:27 16:16 17:10, IV Mac 8:7 10:15*;]
1. to deny, say no, opp. to εἰπεῖν: absol., Mt 26:70, Lk 8:45; seq. ὅτι, I Jo 2:22; c. inf., He 11:24.
2. In late Gk. (MM, s.v.), c. acc. pers., to deny, refuse to acknowledge, disown: Ac 3:14 7:35; Ἰησοῦν, Mt 10:33, II Ti 2:12, I Jo 2:22, Ju 4; ἑαυτόν, Lk 9:23, II Ti 2:13 (prove false to).
3. C. acc. rei (in cl. to refuse), to deny, abjure: I Ti 5:8, Tit 2:12, II Ti 3:5 (cf. ἀπαρνέομαι)

Abbott-Smith References

Book Refs
Genesis 18:15
Matthew 10:33 · 26:70
Luke 8:45 · 9:23
Acts 3:14 · 7:35
1 Timothy 5:8
2 Timothy 2:12 · 2:13 · 3:5
Titus 2:12
Hebrews 11:24
1 John 2:22
Jude 1:4

Liddell-Scott-Jones

ἀρνέομαι,

future -ήσομαι[Refs 5th c.BC+] (ἀπ-), [NT]aorist passive ἠρνήθην frequently in Attic dialect, [Refs 5th c.BC+]: also aorist middle ἠρνησάμην[Refs 8th c.BC+]; rare in Trag. and Attic dialect, [Refs 5th c.BC+]: perfect ἤρνημαι[Refs 4th c.BC+]:—deny, disown, τεὸν ἔπος ἀρνήσασθαι[Refs 8th c.BC+]; ἀρνούμενοι ἔπαινοι negative praises, [Refs 1st c.AD+]

__2 refuse, τόξον.. δόμεναί τε καὶ ἀρνήσασθαι[Refs 8th c.BC+]; . χρείαν decline, renounce a duty or office, [Refs 4th c.BC+]; ζωὰν ., of a suicide, [Refs 3rd c.BC+]; . ἀνθρώπους cast aside humanity, [Refs 4th c.AD+]
__3 absolutely, say No, decline, δ᾽ ἠρνεῖτο στεναχίζων[Refs 8th c.BC+]
__4 in expressing denial, with infinitive, either without μή, deny that.., [Refs 5th c.BC+]; or with μή, say that.. not.., [Refs 5th c.BC+]; οὐδ᾽ αὐτὸς ἀρνεῖται μὴ οὐ.. [Refs 2nd c.AD+]; also οὐκ ἂν ἀρνοίμην τὸ δρᾶν [Refs 5th c.BC+]; . ὅτι οὐ.., ὡς οὐ.., [Refs 5th c.BC+]
__5 in expressing refusal, with infinitive, . εἶναι χρηστούς[Refs 5th c.BC+]: poetry also with participle, οὐ γὰρ εὐτυχῶν ἀρνήσομαι[Refs 5th c.BC+]

LSJ Scripture Refs: Luke.12.9