masc abl sg of ya (letter); masc abl sg of ya (pron); nt abl sg of ya (pron); masc abl sg of ya (cs)
Analysis. yasmā is the ablative singular of the relative pronoun ya, functioning as an indeclinable conjunction. The -smā ending is the ablative morpheme (appearing with consonant stems); literal sense 'from which' develops into causal 'because'.
Etymology. ya is the Indo-European relative pronoun stem (*i̯o-), cognate with Sanskrit ya-, Greek ho (article and relative), Latin qui, English who. The ablative ending -smā (from -sma-) derives from PIE instrumental *-sme, preserved in Greek -the and Latin -ce (or -ism in certain contexts). The semantic shift from locative 'from which' to conjunctive 'because' is natural in all these languages.
Meanings from the Digital Pāḷi Dictionary; morphology and etymology by Claude.
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