Ilk. [eu], [iu] became [io]; [eu|iu] > [io]
These developments were described in the Comparative Tables (PE19/25), but there is only one attested example of each: ᴹ✶ndeuro > Dor. Dior (Ety/NDEW) and ᴹ✶tiukā > Ilk. tiog (Ety/TIW).
Phonetic Rule Elements
||✧ PE19/25 (eu > io)|
||✧ PE19/25 (iu > io)|
Phonetic Rule Examples
|ndeuro > ndioro||eu > io||ᴹ✶ndeuro > Dor. Dior||✧ Ety/NDEW|
|tiuka > tioka||iu > io||ᴹ✶tiu̯kā > Ilk. tiog||✧ Ety/TIW|