5 verses have
unable
in Edition Clear Qur'an by Talal Itani / Al-Kahf (The Cave)

18:41Or its water will sink into the ground, and you will be unable to draw it.”

18:78He said, “This is the parting between you and me. I will tell you the interpretation of what you were unable to endure.

18:82And as for the wall, it belonged to two orphaned boys in the town. Beneath it was a treasure that belonged to them. Their father was a righteous man. Your Lord wanted them to reach their maturity, and then extract their treasure—as a mercy from your Lord. I did not do it of my own accord. This is the interpretation of what you were unable to endure.”

18:97So they were unable to climb it, and they could not penetrate it.

18:101Those whose eyes were screened to My message, and were unable to hear.