masc dat sg of ka (interr); nt dat sg of ka (interr); masc gen sg of ka (interr); nt gen sg of ka (interr); …
Analysis. kissa is the dative and genitive singular of the interrogative pronoun ka (who?, what?). The form shows inherited inflection from Indo-European *k̑id-, the stem underlying all interrogatives in the family.
Etymology. From Proto-Indo-European *k̑id- (interrogative root), which also underlies English who, what, German wer, wer, Sanskrit ka-, and Latin quod. The Pali forms reflect the ancient case-system: kissa blends dative (for whom?, purpose) and genitive (of whom?, possession) in a single oblique form, as happened throughout the nominal declension as Sanskrit and Pali evolved.
Meanings from the Digital Pāḷi Dictionary; morphology and etymology by Claude.
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