'Able' in the Bible

But Naomi replied, “Return home, my daughters. Why do you want to go with me? Am I able to have any more sons who could become your husbands?

Wherever you die, I will die -- and there I will be buried. May the Lord punish me severely if I do not keep my promise! Only death will be able to separate me from you!"

And the redeemer saith, 'I am not able to redeem it for myself, lest I destroy mine inheritance; redeem for thyself -- thou -- my right of redemption, for I am not able to redeem.'