Comparative evidence

h₃reǵ

• OInd. ṛj-/ṛñj-/arj- 'direct', 'stretch', 'attain' (Whitney 1885: 14); 'make straight', 'make right', 'make proper', 'arrange', 'fit out', 'decorate', 'ornament'; 'make favourable', 'propitiate'; 'gain', 'obtain' (MW: 225)

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.