In plain words
Even when Laya and Vikṣepa are absent, Kaṣāya is the Citta-vṛtti's failure to rest upon the indivisible Reality because it has been made rigid by the Vāsanā of Rāga and the rest.
Even when Laya and Vikṣepa are absent, Kaṣāya is the Citta-vṛtti's failure to rest upon the indivisible Reality because it has been made rigid by the Vāsanā of Rāga and the rest.