indeclinable (interrogative adverb)
Analysis. Compound of kiṁ (what) + tvā (suffix marking the adverbial form); literally 'in what manner or degree'.
Etymology. kiṁ is the neuter interrogative pronoun (English what, Latin quid, Sanskrit kiṁ); tvā is an old instrumental/adverbial suffix forming adverbs from adjectives and pronouns, deriving ultimately from Indo-European *-twe(h₂). The compound expresses the scope or manner of a question.
Meanings from the Digital Pāḷi Dictionary; morphology and etymology by Claude.
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