Ablaut

I declare to you that Literature was not written for schoolmasters, nor for schoolmistresses. I would not exchange it for a wilderness of schoolmasters. It should be delivered from them, who, with their silly Ablauts and ‘tendencies,’ can themselves neither read nor write.

This root must once have ablauted, given the associated nominal derivatives prthii- 'broad', prthivl- 'earth'. However, it does not ablaut at all in its verbal forms.

What we find is that one cannot predict which members of V a given member of E will cause to ablaut

It is these co-opted verbs that tend to ablaut variably in the different Dakotan dialects and that forced morphological restructuring

This allomorph also causes the back vowel to ablaut to a low vowel.