indeclinable

1. part. of affirmation (cp. na¹): surely, certainly Pv.ii.6#7 (so to be read for nanda? variant reading BB nuna); Manor. Pūr. on AN.v.194 (Andersen P. R. 91)
2. part. of interrogation (= Lat. nonne) “is it not (cp. na²): Ja.i.151; Ja.iii.393; Dhp-a.i.33.

Ved. nanu