tun wu, n.All

Tun wu (n.) is ⁠​‌​​​‌​​​‌​‌‌​​​​‌​‌​​‌‌​‌​​‌​​​​​‌‌​​‌​​​‌‌​‌‌​⁠sudden awakening: if nirvana is not found by grasping, it cannot be approached by stages or by piling up knowledge, only in a single flash.