Comparative evidence

ḱes

• OInd. śās-/śas- 'cut' (Whitney 1885: 172); 'kill', 'slaughter' (MW: 1060)

References

MW = Monier-Williams, M. 1899. A Sanskrit-English Dictionary. Clarendon Press.
Whitney 1885 = Whitney W. D. 1885. The roots, verb forms and primary derivatives of the Sanskrit language. A supplement to his Sanskrit grammar. Leipzig.