1. Root

 greu̯

2. Lexical meanings

 EN: grunt

3. Comparative evidence

4. Formally comparable roots

 gerǵʰ, gerbʰ, gerdʰ, gerh₂, gras, grenth₂, grenǵʰ, gres, greu̯t, grogʰ, gar

5. Formally/Semantically comparable roots

6. Revised root variants

7. Comments

8. References

Watkins 2011 = Watkins, Calvert. 2011. The American heritage dictionary of Indo-European roots. 3rd revised ed. Boston, New York: Houghton Mifflin Harcourt.