PTS Pali-English dictionary - The Pali Text Society's Pali-English dictionary
Vyavasāna
Vyavasāna,(nt.) [somewhat doubtful.It has to be compared with vavassagga,although it should be derived fr.sā (cp.pp.vyavasita; or śri?),thus mixture of sṛj &sā.Cp.a similar difficulty of sā under osāpeti] decision,resolution; only used to explain part.handa (exhortation) at SnA 200,491 (v.l.vyavasāya:cp.vavasāya at DA.I,237),for which otherwise vavassagga.(Page 653)