PTS Pali-English dictionary - The Pali Text Society's Pali-English dictionary
Ossanna
Ossanna,[pp.of osīdati for osanna,ss after ussanna] sunk,low down,deficient,lacking J.I,336 (opp.ussanna).Hardly to be derived from ava + syad.(Page 172)
U Hau Sein’s Pāḷi-Myanmar Dictionary ပါဠိျမန္မာ အဘိဓာန္(ဦးဟုတ္စိန္)