'Ashamed' in the Bible

For if I have boasted any thing to him of you, I am not ashamed; but as we spake all things to you in truth, even so our boasting, which I made before Titus, is found a truth.

Lest haply if they of Macedonia come with me, and find you unprepared, we (that we say not, ye) should be ashamed in this same confident boasting.

For though I should boast somewhat more of our authority, which the Lord hath given us for edification, and not for your destruction, I should not be ashamed:

I am ashamed to admit it, but we have been too weak for that. Whatever anyone else dares to claim I am talking like a fool I can claim it, too.