Those Prakṛties (types) of Ghāti (destroying) Karma, which destroy a part of the spiritual qualities such as knowledge etc... E.g.- Matijñānāvaraṇa and the like.
...tassesa desaghāittaṇā u puṇa desaghāīo...
nāṇāvaraṇacaukkaṃ daṃsaṇatiga nokasāya vigghapāṇaṃ.
saṃjalaṇa desaghāī........
(Paṃsaṃ 3.18,19)