adjective causing to decay, destroying, annihilating; f. ˚ā decay, destruction, death SN.iv.339; AN.i.221; AN.ii.198; AN.v.215 sq. (dasa-n-vatthūni) Pts.i.5 (id.).

Sk. nirjara in diff. meaning, P. nis functioning as emphatic pref.; nis + jara