Back to Matrix [ei] → [oi] Edit this Data

[oi]→[ei]Certainty: 4/5Commonality: 3/5

Unrounding Vowel Shift Diphthong Monophthongization (partial) Romance Indo-European Italic

Diphthong oi to Diphthong ei

The diphthong /oi/ can undergo a phonetic transformation to /ei/, primarily through a process of unrounding and fronting of its initial vowel component. This shift involves the rounded back-mid vowel /o/ becoming the unrounded front-mid vowel /e/, while the second element of the diphthong, /i/, remains consistent.

Phonetic Effects

Unrounding, Fronting of the Initial Vowel Element of the Diphthong

Language Examples

Latin Italic

*deiuoi→*deiuei— In unstressed final syllables, particularly in the nominative and dative plural endings of o-stem nouns.

Related Transformations

Reverse

More Vowel Shift Shifts

[ã] → [õ] — Raising [a] → [ã] — Assimilatory Nasalization [a] → [∅] — Elision [a] → [ə] — Vowel Reduction [ai] → [e] — Monophthongization

Sources & References

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