Some sources such as LIV:98-101 reconstruct the full-grade form *bʰewh₂-, *bʰweh₂-, solely on the basis of Italic and Celtic preterite and subjunctive stem, which are according to Jasanoff 2003:112-113 unjustified, and the root laryngeal cannot be precisely determined.
- Balto-Slavic: *būtei
- Germanic: *beuną (only the verb forms starting with b-), *būaną, *buskaz
- Ancient Greek φύω (phúō)
- Indo-Iranian: *bhávati