'Doubtless' in the Bible

If I be not an apostle unto others, yet doubtless I am to you: for the seal of mine apostleship are ye in the Lord.

It is not expedient for me doubtless to glory. I will come to visions and revelations of the Lord.

Yea doubtless, and I count all things but loss for the excellency of the knowledge of Christ Jesus my Lord: for whom I have suffered the loss of all things, and do count them but dung, that I may win Christ,