'Denying' in the Bible

instructing us, to the intent that, denying ungodliness and worldly lusts, we should live soberly and righteously and godly in this present world;

But there arose false prophets also among the people, as among you also there shall be false teachers, who shall privily bring in destructive heresies, denying even the Master that bought them, bringing upon themselves swift destruction.

For there are certain men crept in privily, even they who were of old written of beforehand unto this condemnation, ungodly men, turning the grace of our God into lasciviousness, and denying our only Master and Lord, Jesus Christ.