'Deny' in the Bible

And he said to them all, If any one will come after me, let him deny himself and take up his cross daily and follow me;

And some of the Sadducees, who deny that there is any resurrection, coming up to him,

And he said, I tell thee, Peter, the cock shall not crow to-day before that thou shalt thrice deny that thou knowest me.

And the Lord, turning round, looked at Peter; and Peter remembered the word of the Lord, how he said to him, Before the cock crow thou shalt deny me thrice.