prajna

Prajñā (Sanskrit) or paññā (Pali) has been translated as "wisdom," "understanding," "discernment," "cognitive acuity," or "know-how." In Buddhism, it especially refers to the wisdom that is based on the direct realization of the Four Noble Truths, impermanence, dependent origination, not-self, emptiness, etc. Prajñā is the wisdom that is able to extinguish afflictions and bring about enlightenment.
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Prajna (Sanskrit) [from pra before + the verbal root jna to know] To know through clear perception, to discern clearly; wisdom, intellectual perception or knowledge as contrasted with mere brain-mind ratiocination. Its cultivation is one of the Buddhist paramitas.

This term, meaning wisdom, is the supreme wisdom considered by Mahayana Buddhism to be outside human experience and incapable of being conveyed in this-world categories. The key experience of prajna is insight into Emptiness, the true nature of the cosmos. This is usually attained during enlightenment.