The word kufu' as used in the original means an example, a similar thing, the one equal in rank and position. In the matter of marriage, kufu' means that the boy and the girl should match each other socially.
The verse means that there is no one in the entire universe, nor ever was, nor ever can be, who is similar to Allah, or equal in rank with Him, or resembling Him in His attributes, works and powers in any degree whatever.
THE PREACHER OF GOD’S WORD WISHES PEOPLE WELL, NO MATTER HOW THEY TREAT HIM
The Prophet besieged Taif for more than twenty days. When it became difficult for the Muslims to continue with the siege, he ordered them towithdraw. It was then suggested that the Prophet bring down a curse upon the heads of the Thaqeef tribe, but the Prophet merely raised both hands and prayed: “Lord, guide the Thaqeef, and bring them into the fold of Islam.” The Prophet was likewise told of the contumacy and disbelief of the Daus tribe, and again it was suggested that he should invoke a curse upon them, but the Prophet’s response was again to pray. “Lord, guide the Daus,” he begged, “and bring them into the fold of the faithful.”