1. Root

 2.ḱen

2. Lexical meanings

 EN: empty

3. Comparative evidence

4. Formally comparable roots

 2.ḱend, ḱnei̯gʷʰ, ḱan, ḱens, ḱen, ḱend, ḱenk, ḱent, ḱneth₂

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.