1. Root

 2.bʰreu̯h₁, 2.bʰreu̯h₂, 2.bʰreu̯h₃, 2.bʰreu̯

2. Lexical meanings

 DE: aufbrechen
EN: break up, cut

3. Comparative evidence

4. Formally comparable roots

 1.bʰer, 1.bʰerdʰ, 1.bʰerǵʰ, 1.bʰrem, 1.bʰres, 1.bʰreh₁u̯, 1.bʰreu̯, 1.bʰreu̯h₁, 1.bʰreu̯h₂, 1.bʰreu̯h₃, 1.bʰreu̯s, 2.bʰerdʰ, 2.bʰerh₁, 2.bʰerh₂, 2.bʰerh₃, 2.bʰerǵʰ, 2.bʰerm, 2.bʰrem, 2.bʰres, 2.bʰreu̯s, 3.bʰer, 4.bʰer, 5.bʰer, 6.bʰer, 6.bʰerh₁, 6.bʰerh₂, 6.bʰerh₃, bʰrenḱ, bʰreḱ, bʰardʰ, bʰarsdʰ, bʰerg, bʰergʰ, bʰerh₁ǵ, bʰerh₂ǵ, bʰerh₃ǵ, bʰerh₁ḱ, bʰerh₂ḱ, bʰerh₃ḱ, bʰerh₂, bʰers, bʰeru̯, bʰerǵ, bʰerǵʰ, bʰrag, bʰredʰ, bʰreh₁, bʰreh₁ǵ, bʰrei̯h, bʰrei̯h₁, bʰrei̯h₂, bʰrei̯h₃, bʰrei̯h₁k, bʰrei̯h₂k, bʰrei̯h₃k, bʰrei̯ǵ, bʰrekʷ, bʰremh₁, bʰremh₂, bʰremh₃, bʰrend, bʰrenk, bʰreu̯h₁g, bʰreu̯h₁ǵ, bʰreu̯h₂g, bʰreu̯h₂ǵ, bʰreu̯h₃g, bʰreu̯h₃ǵ, bʰreu̯k, bʰreu̯ḱ, bʰreg, bʰreǵ

5. Formally/Semantically comparable roots

 1.bʰreu̯s, 2.bʰerdʰ, 6.bʰer, 6.bʰerh₁, 6.bʰerh₂, 6.bʰerh₃, bʰrei̯h, bʰrei̯h₁, bʰrei̯h₂, bʰrei̯h₃

6. Revised root variants

7. Comments

 Watkins 2011: 13: extended form of *2.bher- ‘cut’

8. References

LIV = Rix, Helmut et al. 2001. Lexikon der indogermanischen Verben: Die Wurzeln und ihre Primärstammbildungen. 2 Aufl. Wiesbaden: Dr. Ludwig Reichert Verlag.

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