G0720–ἀρνέομαι–arneomai

Who is the liar, except he who is denying that Jesus is the Christ? this one is the antichrist who is denying the Father and the Son;

ἀρνούμενος arnoumenos “denying”ἀρνούμενος arnoumenos “denying”

every one who is denying the Son, neither hath he the Father, `he who is confessing the Son hath the Father also.'

ἀρνούμενος arnoumenos “is denying”

for there did come in unobserved certain men, long ago having been written beforehand to this judgment, impious, the grace of our God perverting to lasciviousness, and our only Master, God, and Lord -- Jesus Christ -- denying,

ἀρνούμενοι. arnoumenoi “denying.”

I have known thy works, and where thou dost dwell -- where the throne of the Adversary `is' -- and thou dost hold fast my name, and thou didst not deny my faith, even in the days in which Antipas `was' my faithful witness, who was put to death beside you, where the Adversary doth dwell.

ἠρνήσω ērnēsō “you have denied”

I have known thy works; lo, I have set before thee a door -- opened, and no one is able to shut it, because thou hast a little power, and didst keep my word, and didst not deny my name;

ἠρνήσω ērnēsō “denied”