'Otherwise' in the Bible

So now assemble the rest of the army and besiege the city and capture it. Otherwise I will capture the city and it will be named for me."

So David said to all his servants who were with him in Jerusalem, "Come on! Let's escape! Otherwise no one will be delivered from Absalom! Go immediately, or else he will quickly overtake us and bring disaster on us and kill the city's residents with the sword."

Then David said to Abishai, "Now Sheba son of Bicri will cause greater disaster for us than Absalom did! Take your lord's servants and pursue him. Otherwise he will secure fortified cities for himself and get away from us."