[u]→[y]Certainty: 5/5Commonality: 5/5

Close back rounded vowel to Close front rounded vowel

Vowel fronting (Umlaut or i-mutation) shifts the high back rounded vowel [u] to its high front rounded counterpart [y]. This process is typically triggered by a high front vowel or semi-vowel in the following syllable, pulling the tongue position forward while maintaining lip rounding.

Phonetic Effects

Fronting, Umlaut, I-mutation

Language Examples

German Germanic

Maus [maʊs] (sing.)→Mäuse [ˈmɔʏzə] (plur.)— Historical i-mutation of the plural suffix caused fronting of the root vowel.

French (Historical) Romance

lūna (Latin)→lune [lyn]— Latin long /u:/ underwent spontaneous fronting to /y/ in the development of French.

Related Transformations

Reverse

More Romance Shifts

[ã] → [õ] — Raising [a] → [ã] — Assimilatory Nasalization [a] → [∅] — Elision [a] → [ʔ] — Glottalization [a] → [ə] — Vowel Reduction

Sources & References

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