Comparative evidence

gʷerh₁, gʷerh₂, gʷerh₃

• OInd. gur- 'greet' (Whitney 1885: 37); 'raise', 'lift up', 'make effort'; 'hurt'; 'go' (MW: 359)

• OInd. gṝ-/gr̥- 'sing' (Whitney 1885: 38); 'call', 'call out' (to), 'invoke'; 'announce', 'proclaim'; 'mention with praise', 'praise', 'extol'; 'pronounce', 'recite'; 'relate', 'teach in verses' (MW: 363)

• OInd. jṝ-/jr̥- 'sing' (Whitney 1885: 55); 'crackle' (as fire); 'call out' (to), 'address', 'invoke', 'praise' (MW: 424)

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.