penetration, insight; adj.: penetrating, piercing, scrutinising, sharp. Freq. in phrase nibbedha-bhāgiya (sharing the quality of penetration), with ref. to samādhi, saññā etc. [cp. BSk nirvedha˚ Divy.50; but also nirbheda˚ Avs.ii.181, of kusalamūlāni; explained as lobhakkhandhassa (etc.) nibbijjhanāni at Ne.274] DN.iii.251, DN.iii.277; AN.iii.427 Vb.330; Ne.21, Ne.48, Ne.143 sq., Ne.153 sq.; Vism.15, Vism.88; Dhs-a.162
■ Also in nibbedha-gāminī (paññā) Iti.35 & dunnibbedha (hard to penetrate, difficult to solve Mil.155, Mil.233 (pañha); spelt dunniveṭha at Mil.90).

nis + vedha, to vyadh