That is the Knower of the unseen and the witnessed, the Exalted (32:6)

Almuntakhab Fi Tafsir Alquran Alkarim

And so this is Allah, your Creator, the Omniscient of the invisible, the hidden and the unseen and the Omniscient of what the bosoms store of thoughts and feelings and of what they forge. This is Allah Who has cognizance and holds prescience of what you converse secretly and utter below your breath and of what you suggest secretly to the mind. And He is well acquainted with the visible and the seen, AL-Aziz (the Almighty) and AL-Rahim (the Merciful)

Tafseer Tafheem-ul-Quran by Syed Abu-al-A'la Maududi

(32:6) He knows *10 all that is beyond as well as all that is within a creature's sense-perception. He is the Most Mighty, *11 the Most Compassionate, *12

That is the Knower of the unseen and the witnessed, the Exalted meaning

*10) That is, "For others one thing may be open and known but countless other things hidden. Whether angels or jinns, prophets or saints, or other pious people, none of them has the knowledge of everything. It is Allah alone Who knows everything. He knows all that has passed, all that is present, and all that will happen in the future. "
*11) 11. "The All-Mighty": The One Who is dominant over everything: no power in the universe can hinder Him in His Design and Will and obstruct His Command from being enforced. Everything is subdued. to Him and nothing can resist Him.
*12) That is, He is not tyrannous to His creatures but is Gracious and Merciful in spite of being overwhelmingly dominant and possessor of all power and authority.
 

That is the Knower of the unseen and the witnessed, the Exalted meaning in Urdu

وہی ہے ہر پوشیدہ اور ظاہر کا جاننے والا، زبردست، اور رحیم