glass, originally of jewels; it is once applied to jewels,
along with vimala and suddha, in DN ii.244.10 = Jāt.
ii.418.20; another theory in Senart i note 508), free from
blemish or impurity: achidram akācam avraṇaṃ anāśravam
te caraṇaṃ Mv i.164.7.