Inherited from Sanskrit कस्य (kasya). Alternative 𑀓𑀺𑀲𑁆𑀲 (kissa) is by analogy to the -i- in 𑀓𑀺𑀁 (kiṃ). Cognate with Pali kassa.
𑀓𑀲𑁆𑀲 (kassa) (Devanagari कस्स, Kannada ಕಸ್ಸ) (Māhārāṣṭrī)