Comparative evidence

h₁ei̯ḱ, h₂ei̯ḱ, h₃ei̯ḱ

• OInd. īś- 'be master' (Whitney 1885: 11); 'own', 'possess'; 'belong' (to); 'dispose' (of), 'be valid', 'be powerful'; 'command'; 'rule', 'reign'; 'behave like a master', 'allow' (MW: 171)

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.