Reconstruction:Proto-Germanic/turbz

Etymology
From. Don Ringe argues that the lack of a-mutation in Old High German shows that must have originally been a consonant stem. In addition, 🇨🇬 clearly shows a consonant-stem declension. In many of the descendants, the noun was thematized early on enough to cause a-mutation in the descendant forms.

Noun

 * 1) turf, peat