ablaut

/ˈæblaʊt/
noun
  1. A change in a vowel sound that shows a change in grammar, like in 'sing, sang, sung'.
    • In English, ablaut helps form irregular verbs like 'drink, drank, drunk'.
    • The teacher explained ablaut by showing how 'write' becomes 'wrote'.
    • Learning ablaut patterns can help you understand verb changes in many languages.
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