1. Root

 2.dʰeu̯bʰ, 2.dʰeu̯b

2. Lexical meanings

 EN: deep, hollow

3. Comparative evidence

4. Formally comparable roots

 1.dʰeu̯, 1.dʰeu̯bʰ, 1.dʰeu̯gʰ, 1.dʰu̯enh₁, 1.dʰu̯enh₂, 1.dʰu̯enh₃, 1.dʰu̯er, 2.dʰeu̯, 2.dʰeu̯gʰ, 2.dʰu̯enh₂, 2.dʰu̯er, 3.dʰeu̯bʰ, 3.dʰeu̯gʰ, 3.dʰeu̯, 3.dʰeu̯h₁, 3.dʰeu̯h₂, 3.dʰeu̯h₃, 4.dʰeu̯, 4.dʰeu̯h₂, dʰeu̯b, dʰeu̯dʰ, dʰeu̯h₂i̯, dʰeu̯s, dʰu̯eh₂, dʰu̯en, dʰu̯ens, dʰu̯es

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.