only in phrase netthāraṃ vattati to behave in such a way as to get rid of blame or fault Vin.ii.5; Vin.iii.183; MN.i.442
■ Bdhgh on Vin.ii.5 (p. 309) explains: nittharantānaṃ etan ti netthāraṃ yena sakkā nissāraṇā nittharituṃ taṃ aṭṭhārasa-vidhaṃ sammāvattuṃ vattantī ti attho.

see nittharati; does any connection exist with Vedic neṣṭṛ?