The possessor of all strength. He who is all-powerful and all powers originate from Him
“We sent aforetime Our Messengers with Clear Signs and sent down with them the Book and the Bal- ance (of Right and Wrong), that men may stand forth in justice; and We sent down Iron, in which is (material for) mighty war, as well as many benefits for mankind, that Allah may test who it is that will help, unseen, Him and His Messengers: for ALLAH IS FULL OF STRENGTH, Exalted in Might (and able to enforce
(57:25) The Holy Quran
From the root q-w-y with the classical Arabic connotations: to be strong, vigorous, potent to be robust, hardy, sturdy to have sufficient strength or power to prevail over.