ON. [eu] sometimes became [io]; [ˌeu] > [io]

ON. [eu] sometimes became [io]; [ˌeu] > [io]
GS/§4.60, GS/§4.222

Related

Phonetic Rule Elements

[ˌeu] > [io]

Phonetic Rule Examples

beuro > bioro ˌeu > io ᴹ✶beu̯rō > biuro > ON. bioro ✧ Ety/BEW
sneuma > snioma ˌeu > io ON. snȳma > hniof > N. hnuif ✧ Ety/SNEW
sneuma > snioma ˌeu > io ᴹ√SNEW > sniuma > ON. snȳma ✧ Ety/SNEW