'Availeth' in the Bible

Yet all this availeth me nothing, so long as I see Mordecai the Jew sitting at the king's gate.

For in Christ Jesus neither circumcision availeth anything, nor uncircumcision; but faith working through love.

Confess therefore your sins one to another, and pray one for another, that ye may be healed. The supplication of a righteous man availeth much in its working.