'Stronger' in the Bible

The Lord said to her,“[The founders of] two nations are in your womb;And the separation of two nations has begun in your body;The one people shall be stronger than the other;And the older shall serve the younger.”

Furthermore, whenever the stronger [animals] of the flocks were breeding, Jacob would place the branches in the sight of the flock in the watering troughs, so that they would mate and conceive among the branches;

but when the flock was sickly, he did not put the branches there; so the sicker [animals] were Laban’s and the stronger Jacob’s.