Etymograph : Old Norse : Rules : on-vowel-deletion

Etymograph > Indo-European > Old Norse > Rules > on-vowel-deletion

Source: Faarlund 2010:13

sound is 'i' and previous sound is stressed long front vowel:

sound is 'a' and previous sound is stressed long back open vowel:

the book says 'back, labial vowel' but this doesn't match example I think?

sound is 'u' and previous sound is stressed long back vowel: