grammatical alternation meaning in Hindi

Examples

1. This produced many lexical and grammatical alternations between stressed and unstressed syllables.
2. A major disadvantage, however, is that it results in a large number of unexplained lexical and grammatical alternations.
3. The alternations that had started as mere phonetic variants of sounds became increasingly grammatical in nature, leading to the grammatical alternations of sounds known as Grammatischer Wechsel.
4. It is therefore impossible to distinguish them in reconstruction, unless there is additional internal evidence ( in the form of grammatical alternations ) or external evidence ( from non-Finnic languages ).