1. Root

 h₂ei̯k

2. Lexical meanings

 EN: strike

3. Comparative evidence

4. Formally comparable roots

 1.h₂ei̯, 2.h₂ei̯, h₂ei̯g, h₂ei̯ǵʰ, h₂ei̯ḱ, h₂i̯aǵ, h₂i̯eh₁, h₂i̯eu̯dʰ, h₂ei̯d, h₂ei̯dʰ, h₂ei̯m, h₂ei̯r, h₂ei̯s, h₂ei̯sd, h₂ei̯u̯, h₂ei̯ǵ, h₂ei̯ḱ

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.