The word(s) "defend" appears 14 time(s) in 13 verse(s) in Quran in Muhammad Habib Shakir translation.

(11) So they were not able to rise up, nor could they defend themselves-

(12) The flames of fire and smoke will be sent on you two, then you will not be able to defend yourselves.

(13) He it is Who caused those who disbelieved of the followers of the Book to go forth from their homes at the first banishment you did not think that they would go forth, while they were certain that their fortresses would defend them against Allah; but Allah came to them whence they did not expect, and cast terror into their hearts; they demolished their houses with their own hands and the hands of the believers; therefore take a lesson, O you who have eyes!