Unknown. Several possibilities have been proposed, although none are particularly convincing:
The first theory involves an analysis of Latin unda continuing *u-n-deh₂ rather than *ud-neh₂, while there is little semantic evidence for the second theory.[1]
*wintruz m
Most descendants (in particular Gothic) show a u-stem paradigm:
u-stemDeclension of *wintruz (u-stem) | |||
---|---|---|---|
singular | plural | ||
nominative | *wintruz | *wintriwiz | |
vocative | *wintru | *wintriwiz | |
accusative | *wintrų | *wintrunz | |
genitive | *wintrauz | *wintriwǫ̂ | |
dative | *wintriwi | *wintrumaz | |
instrumental | *wintrū | *wintrumiz |
However, Old Norse shows a consonant stem paradigm:
consonant stemDeclension of *wintruz (consonant stem) | |||
---|---|---|---|
singular | plural | ||
nominative | *wintruz | *wintriz | |
vocative | *wintru | *wintriz | |
accusative | *wintrų | *wintrunz | |
genitive | *wintriz | *wintrǫ̂ | |
dative | *wintri | *wintrumaz | |
instrumental | *wintrē | *wintrumiz |
If that is indeed the original paradigm, it may have arisen as follows: The nominative and vocative singular would have come from older *wintr̥-s and *wintr̥, respectively, into which an epenthetic u had been inserted before a syllabic sonorant, as is usual in Germanic. This formed *winturz and *wintur. The -ur- was then later metathesized into a form resembling a u-stem nominative (likely based on the accusative forms).
In most of the daughter languages this word was mostly replaced by *jērą in the sense of a year as a unit of time.
Seasons in Proto-Germanic · *jērastīdīz (layout · text) · category | |||
---|---|---|---|
*wazrą (“spring”) | *sumaraz (“summer”) | *harbistaz (“autumn”) | *wintruz (“winter”) |