1. Root

 kaid

2. Lexical meanings

 EN: heat

3. Comparative evidence

4. Formally comparable roots

 kai

5. Formally/Semantically comparable roots

 kai

6. Revised root variants

7. Comments

 Extended form of PIE *kai- (Watkins 2011: 37).

8. References

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