DictionaryumlautVowel sound change
noun

umlaut

A vowel change caused by a following sound in Germanic languages.

The vowel difference between foot and feet is a result of umlaut.

Etymology

The German term expresses a change of sound. Linguistics uses it for vowel alteration conditioned by a later sound in the word.

More examples

  • In German, umlaut helps distinguish some singular nouns from their plurals.
  • The vowels that originally triggered umlaut often disappeared from later forms.
  • Students trace the umlaut in mouse and mice to an earlier vowel.

Forms

umlaut · umlauts

Similar words

mutation
A broader term for sound changes, including consonant changes.
assimilation
Sounds become more alike; not limited to vowels or Germanic languages.