Directly knowing suffering, origin, cessation and path; knowing Dhamma, completely purified, one realizes cessation.

Abhiññāya — with direct knowledge (abhiññā). Not knowing by report, but knowing by direct experience.

Visuṭṭhānaṃ — completely purified. Visuddhi is the purification that passes through seven stages on the Buddhist path, from ethical purity to purity of knowledge.