ᴱQ. [eu], [iu] became [euw], [iuw] before unstressed vowel, [ew], [iw] before stressed vowel; [{ei}uV|{ei}uV́] > [{ei}uwV|{ei}wV́]
References ✧ PE12/12-13
Phonetic Rule Elements
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               > | 
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               ✧ PE12/12 (éu̯- + vowel > euv-) | 
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               > | 
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               ✧ PE12/12 (íu̯- + vowel > iuv-) | 
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               > | 
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               ✧ PE12/13 (ew-́ > ew-́) | 
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               > | 
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               ✧ PE12/13 (iw-́ > iw-́) | 
Phonetic Rule Examples
| tīue- > tīwe- | iuV́ > iwV́ | ᴱ√TIW̯I > ᴱQ. tīwe | ✧ QL/93 |