'Addeth' in the Bible

and she addeth to bear his brother, even Abel. And Abel is feeding a flock, and Cain hath been servant of the ground.

And he stayeth yet other seven days, and addeth to send forth the dove from the ark;

And he addeth again to speak unto Him and saith, 'Peradventure there are found there forty?' and He saith, 'I do it not, because of the forty.'

And Abraham addeth and taketh a wife, and her name is Keturah;

and she addeth again, and beareth a son, and calleth his name Shelah; and he was in Chezib in her bearing him.