Grammatischer Wechsel
In historical linguistics, the German term grammatischer Wechsel ("grammatical alternation") refers to the effects of Verner's law when they are viewed synchronically within the paradigm of a Germanic verb. == Overview == According to Grimm's law, the Proto-Indo-European (PIE) voiceless stops *p, *t, *k and *kʷ usually became Proto-Germanic *ɸ, *θ (dental fricative), *x and *xʷ (velar fricative).