Why does Old Norse tíu (from PGmc *tehun) have í instead of é? Compare *fehu > fé.

I didn't find the answer here

  • 2
    Why would you expect /VhV/ to yield a short vowel instead of a long one? Mar 13 '21 at 15:40
  • @JanusBahsJacquet I don't expect "i" from PGmc "e" at all (short or long)
    – fedor
    Mar 13 '21 at 16:42
  • 2
    The latter two are entirely regular: overlong vowels are reduced, so and *āa coincide in a priori; and both *ai and *au become á before *h, which disappears. I suggest removing those two questions, because they make it look like you’re asking why the vowels are long. Why the *e becomes *i in ‘ten’ is a much better question. A priori, we would expect *tehun > *tehũ > *tehu > *tehʷ > (parallel with *fehu > ). Why it’s treated differently is a very good question. Mar 13 '21 at 17:35
  • 1
    I edited the question based on Janus's suggestion to make it clearer what you're asking; feel free to roll back if you disagree.
    – Draconis
    Mar 13 '21 at 17:44
  • @JanusBahsJacquet I think the reason is that PGmc u (from syllabic sonorant *tehun *newun) doesn't disappear but PGmc u (from non-syllabic sonorant *fehu) do.
    – fedor
    Mar 13 '21 at 18:16

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