Derived words: pūṣāwūtu ‘laundry work’ (CAD P 538, AHw. 883); pūṣāyu ‘launderer’ (CAD P 538, AHw. 883); puṣāˀū (puṣû) ‘white’ (CAD P 328, AHw. 857); puṣīˀū, puṣû ‘white gold’ (CAD P 539, AHw. 883); puṣṣû ‘white’ (CAD P 539); pūṣu ‘white spot’ (CAD P 539, AHw. 883).
May be related to PCS
*pṣḥ ‘to be bright’.