Comparative evidence

ḱrei̯h₁, ḱrei̯h₂, ḱrei̯h₃

• OInd. śrī-/śr̥- 'mix' (Whitney 1885: 179); 'mingle', 'cook'; 'burn', 'flame', 'diffuse light' (MW: 1098)

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.