masc dat sg of ca (letter); masc gen sg of ca (letter)
Analysis. ca (enclitic conjunction, 'and') + assa (optative/conditional of atthi 'to be': 'would be, might be, if there were'). The form contracts in sandhi: ca + assa → cassa. In some contexts assa functions as a genitive/locative enclitic particle meaning 'his, of him, for him'.
Etymology. assa is the optative of atthi (√as, 'to be'), cognate with Sanskrit asti, Latin esse, English is. The prefix ca is an enclitic conjunction meaning 'and', related to Latin -que and Greek kai. The combination expresses condition, hypothesis, or possession depending on syntactic context.
Meanings from the Digital Pāḷi Dictionary; morphology and etymology by Claude.
Lite mode — plain HTML for e-readers and old browsers. Full version