vicchinnamūlatvād iti / vicchinnaṃ mūlaṃ pradhānaṃ dharmātmakavastuparijñānaṃ yeṣāṃ te tathoktaḥ /
"[They are called] those whose root [of knowledge] is cut off" - [meaning] those whose principal root, [which is] the knowledge of things that constitute dharma, is cut off.