G2480–ἰσχύω–ischuō

And a will is only of force in the case of a deceased person, being never of any avail so long as he who made it lives.

ἰσχύει ischuei “it is in force”

Therefore confess your sins to one another, and pray for one another, so that you may be cured. The heartfelt supplication of a righteous man exerts a mighty influence.

ἰσχύει ischuei “prevails”

The Dragon fought and so did his angels; but they were defeated, and there was no longer any room found for them in Heaven.

ἴσχυσεν, ischusen “he had [enough] strength,”