1. Root

 kelb

2. Lexical meanings

 EN: help

3. Comparative evidence

4. Formally comparable roots

 1.kel, 1.kel, 2.kal, 2.kel, 2.keld, 2.kel, 3.kel, 4.kel, 5.kel, kal, kel, keld, kelh₁, kelh₂, kelh₃, kelh₂, kelp, keldʰ, kelt, kleh₁, klep, kleu̯b, kleu̯h₁, kleu̯h₂, kleu̯h₃, klemh₁, klemh₂, klemh₃, kleph₁, kleph₂, kleph₃, kleh₂, klei̯ḱ, klenk, klenkʷ, kelh₁, kelh₁, kleh₂u̯, kleh₃dʰ

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.