[ã]→[oi]Certainty: 2/5Commonality: 2/5

The nasalized low vowel [ã] diphthongizes to [oi] through raising, backing, and denasalization. This process occurs in Romance dialects as part of nasal vowel restructuring, though it is relatively rare compared to other nasal diphthongization outcomes. The shift combines vowel movement in the acoustic space with glide formation, resulting in a back rounded diphthong.

Phonetic Effects

Diphthongization, Raising, Backing, Denasalization

Language Examples

Related Transformations

More Raising Shifts

Sources & References

• https://en.wikipedia.org/wiki/Portuguese_phonology
• https://en.wikipedia.org/wiki/Nasal_vowel
• https://en.wikipedia.org/wiki/Romance_languages
• https://en.wikipedia.org/wiki/Nasalization
• https://en.wikipedia.org/wiki/Diphthong