A variety of Bhāva Nikṣepa (transferred epithet for an actualized state);
the epithet 'knower' given to the actualized state of the 'knower' when he is an actual knower of the objects of knowledge as well as he is mindful about them (due to full attention directed to them).
upādhyāyārthajñastadanubhavapariṇataśca āgamato bhāvopādhyāyaḥ.
(Jaisidī 10.0 Vṛ)