Old Khey

Proto-Khey language, reconstructed ancestor of Khufkeyic languages.

Voiceless plosives become fricatives

 * *p > *f
 * *t > *θ
 * *k > *x

Voiced plosives are devoiced

 * *b > *p
 * *d > *t
 * *g > *k

Voiceless fricatives become voiced intervocalically

 * *f > *v
 * *θ > *ð
 * *x > *ɣ

New source of voiced consonats from diphthongs

 * *py > *b —
 * *by > *v —
 * *ky > *g —
 * *gy > *ɣ —
 * *δy > *ð —
 * *sy > *ɕ —
 * *zy > *ʑ —
 * *ty > *tɕ —
 * *dy > *dʑ —

Vowel changes from Proto-Dre

 * *ē > ɤ
 * *e > e
 * *ā > æ
 * *a > a
 * *ī > ei̯
 * *i > i
 * *ō > ɔu̯
 * *o > o
 * *ū > u̯o
 * *u > u

Diphthong monophthongization

 * *ay, ya > æ
 * *oy, oy > ø
 * *uy, yu > y
 * *aw, wa > ɑ
 * *ey, ye > ɛ
 * *ew, we > ø
 * *ow, wo > ɔ