'Deny' in the Bible

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

Then came to him certain of the Sadducees, which deny that there is any resurrection; and they asked him,

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

And the Lord turned, and looked upon Peter. And Peter remembered the word of the Lord, how he had said unto him, Before the cock crow, thou shalt deny me thrice.