Comparative evidence

h₂u̯eks

• OInd. vakṣ-/ukṣ- 'increase' (Whitney 1885: 151); 'grow', 'be strong', 'be powerful'; 'be angry' (MW: 911)

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.