Ablaut meaning

äb'lout', äp'-
A vowel change, characteristic of Indo-European languages, that accompanies a change in grammatical function; for example, i, a, u in sing, sang, sung.
noun
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(linguistics) The substitution of one root vowel for another, thus indicating a corresponding modification of use or meaning; vowel permutation; as, get, gat, and got; sing and song; hang and hung, distinct from the phonetic influence of a succeeding vowel. [Mid 19th century.]
noun
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Patterned change of base vowels in forms of a word or in related words to show changes in tense, meaning, etc., as in the Indo-European languages (Ex.: drink, drank, drunk)
noun
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(intransitive, linguistics, of a vowel-containing linguistic component) To undergo a change of vowel.
verb
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(linguistics) To cause to change a vowel.
verb
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Origin of ablaut

  • German ab off (from Middle High German ab, abe) (from Old High German aba apo- in Indo-European roots) Laut sound (from Middle High German lūt) (from Old High German hlūt kleu- in Indo-European roots)
    From American Heritage Dictionary of the English Language, 5th Edition
  • From German Ablaut (“off-sound”), from ab (“off”), + Laut (“sound”).
    From Wiktionary