definition of the word ablaut

From German ablaut (“‘off-sound’”) < ab (“‘off’”) + laut (“‘sound’”).

ablaut (plural ablauts)

1. (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.

• gradation, alternation, apophony

Definition from Wiktionary Content avaible with GNU Free Documentation License

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