masculine noun, nominative singular + enclitic api
Analysis. paññāsaṃ (nominative masculine) + api (enclitic 'even, also'). The enclitic api attaches to the preceding word, here paññāsa 'fifty', giving the sense 'fifty even' or 'fifty itself'.
Etymology. paññāsa is of uncertain origin but appears related to Sanskrit pañcāśat 'fifty' (from pañca 'five' + the ordinal suffix -āśat). The Pali form shows regular sound changes from the Sanskrit etymon. The number fifty held canonical significance: in the Pali canon, the Suttantapiṭaka's Dīghanikāya and Saṃyuttanikāya are both organized into groups of fifty discourses (paññāsā), establishing a traditional structural unit.
Meanings from the Digital Pāḷi Dictionary; morphology and etymology by Claude.
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