Dictionary Definition:
Assaddhiya (nt.) [a + saddhiya, in form, but not in meaning a grd. of saddahati, for which usually saddheyya; cp. Sk. aśradheyya incredible] disbelief S i.25; A iii.421; v.113 sq., 146, 148 sq., 158, 161; Vbh 371; DA i.235; Sdhp 80.