'Weaker' in the Bible

And the war was long between the house of Saul and the house of David; but David became continually stronger, and the house of Saul became continually weaker.

But much rather, the members of the body which seem to be weaker are necessary;

Ye husbands likewise, dwell with them according to knowledge, as with a weaker, even the female, vessel, giving them honour, as also fellow-heirs of the grace of life, that your prayers be not hindered.