1. Root

 h₁eu̯k

2. Lexical meanings

 DE: lernen, sich gewöhnen
EN: become accustomed

3. Comparative evidence

 Armenian, Indic

4. Formally comparable roots

 1.h₁eu̯, 1.h₁eu̯h₁, 1.h₁eu̯h₂, 1.h₁eu̯h₃, 1.h₁eu̯s, 2.h₁eu̯, 2.h₁eu̯h₂, h₁eu̯, h₁u̯eldʰ, h₁u̯erdʰ, h₁u̯er, h₁eu̯dʰ, h₁eu̯s, h₁u̯egʷʰ, h₁u̯eh₂, h₁u̯eld, h₁u̯erh₁, h₁u̯erh₂, h₁u̯erh₃

5. Formally/Semantically comparable roots

 1.h₁eu̯h₁, 1.h₁eu̯h₂, 1.h₁eu̯h₃

6. Revised root variants

7. Comments

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.