1. Root

 kei̯d

2. Lexical meanings

 EN: call, summon

3. Comparative evidence

4. Formally comparable roots

 ki̯eh₂p, kei̯h₂, kei̯t, kei̯h₂, ki̯eh₂

5. Formally/Semantically comparable roots

6. Revised root variants

7. Comments

 Possibly related to *kei̯h2- 'set in motion' (Watkins 2011: 39).

8. References

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