A type of Dhāranā (mati) (perceptual cognition in the form of retention);
to retain that in mind, which is too much difficult to retain, being profound being profound on account of the Naya (non-absolutistic standpoint) and Bhaṅga (permutation and combi-nation).
....dhāranamatī....duddharaṃ dhareti.
(Sthā 6.64)
...duddharanayabhaṅgaguvilattā..
(VyaBhā 4110)