[ai]→[ẽ]Certainty: 4/5Commonality: 3/5
Diphthong ai to Nasalized close-mid front unrounded vowel
The phonetic transformation of the diphthong /ai/ into the nasalized close-mid front unrounded vowel /ẽ/ is a historically attested shift, primarily observed in the evolution of Romance languages, most notably Old French. This complex change involves both the monophthongization of the diphthong and the nasalization of the resulting vowel, typically triggered by the presence of a following nasal consonant that may subsequently be lost. The audible nasalization of vowels and diphthongs in Old French began around the tenth century.
Phonetic Effects
Monophthongization, Nasalization, Vowel Fronting, Vowel Raising, Vowel Lowering
Language Examples
manum (Latin)→main (Old French)— The Latin /a/ before a nasal consonant evolved into the diphthong /ai/ in Old French. This /ai/ then underwent monophthongization and nasalization. While often realized as /ɛ̃/ in Modern Standard French, a pronunciation of /ẽ/ is attested in certain French dialects, particularly Quebec French, for similar nasal vowel developments (e.g., 'in' and 'im' pronounced as /ẽ/).
famen (Latin)→faim (Old French)— Similarly, Latin 'famen' ('hunger') developed into Old French 'faim'. The diphthong /ai/ in a nasal environment became a nasalized monophthong, with /ẽ/ being a possible realization in some French varieties.
Related Transformations
More Nasalization Shifts
Sources & References
- An introduction to Old French phonology and morphology - Internet Archive
- Old French - Wikipedia
- nasalization as universal phonological process - University of York
- Phonological history of French - Wikipedia
- Portuguese phonology - Wikipedia
- French nasal sounds and other stuff - Linguaphiles
- THE EVOLUTION OF THE SOUND SYSTEM OF PORTUGUESE
- Monophthongization - Wikipedia
- Nasalization | Portuguese Pronunciation
- It seems like all the vowels are the same. Help! : r/French - Reddit
- How to understand which letters are pronounced and which are not. You know, in French it is not clear which letters should not be pronounced in words. Is there a system or do you just need to learn? - Reddit
- Why is 'I' in French sometimes pronounced almost like an 'A' (as in vin, fin, Vincent, imbattable etc) but other times as an 'EE' (as in subit, île, immeuble, illégale, etc)? What is the rule? - Quora
- French Pronunciation Practice Lesson 3 (with a REAL French speaker) - Commeunefrancaise.com
- The Romance languages
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