Ablaut is a phonological phenomenon involving systematic vowel changes within a word to indicate grammatical distinctions, such as tense or number. This process is commonly found in languages like Germanic languages, where vowel alterations can signal variations in meaning or function. For example, in English, the verb "sing" changes to "sang" in the past tense, showing ablaut through the vowel shift. Ablaut is significant in linguistics because it highlights how vowel changes can serve grammatical purposes and contribute to understanding language evolution, morphology, and the relationships between words in a language.

Définition et signification de « ablaut » en anglais

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