Comparative evidence

gʷǵʰer

• OInd. kṣar- 'flow' (Whitney 1885: 28); 'stream', 'glide', 'distil', 'trickle'; 'melt away', 'wane', 'perish'; 'fall', 'slip' (from), 'be deprived' (of); 'cause to flow', 'pour out'; 'give forth a stream', 'overflow', 'soil' (with acrid substances) (MW: 327)

References

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