Comparative evidence

h₁ers

• OInd. r̥ṣ- 'rush', 'push' (Whitney 1885: 16); 'flow', 'glide', 'move' (with a quick motion) (MW: 226)

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.