N. [ei] (sometimes) became [ai] in final syllables; [ei] > [ai]

N. [ei] (sometimes) became [ai] in final syllables; [ei] > [ai]

Order (03400)

After	01000	[ɣ], [ŋ] vocalized before [l], [r], [m], [n]	ᴹ√REG > rhein > N. rhain	Ety/REG
After	02300	initial [r-], [l-] were unvoiced	ᴹ✶(a)ranı̯ā > rhein > N. rhain ᴹ√LEK > lhein > N. lhain	EtyAC/RAN Ety/LEK
After	02400	voiceless stops voiced after vowels	ᴹ✶mrekjā > breig > N. braig	Ety/MERÉK
After	03200	[ai] became [oe] or [ae]	ᴹ√REG > rhein > N. rhain	Ety/REG

Phonetic Rule Elements

[ei]

>

[ai]

Phonetic Rule Examples

eiθ > aiθ	ei > ai	ᴹ√EK > N. aith	✧ Ety/EK
breig > braig	ei > ai	ᴹ✶mrekjā > breig > N. braig	✧ Ety/MERÉK
deinθaur > dainθaur	ei > ai	ᴹ✶ndani-thārō > N. Dainthor	✧ LR/188
erein > erain	ei > ai	ᴹ√ƷAR > N. erain	✧ Ety/ƷAR
geil > gail	ei > ai	ᴹ✶galyā > N. gail	✧ Ety/KAL
l̥ein > l̥ain	ei > ai	ᴹ√LEK > lhein > N. lhain	✧ Ety/LEK
n̥eiθθ > n̥aiθθ	ei > ai	‽ᴹ✶natsai > N. naith	✧ Ety/SNAS
r̥ein > r̥ain	ei > ai	ᴹ√REG > rhein > N. rhain	✧ Ety/REG
r̥ein > r̥ain	ei > ai	ᴹ✶(a)ranı̯ā > rhein > N. rhain	✧ EtyAC/RAN

ᴱN. [ei] became [ai] or [ui]; [ei] > [ai|ui]

Phonetic Rule Elements

[ei]	>	[ai]	✧ PE15/64 (eı̯ > ai); PE15/64 (eı̯ > ai)
[ei]	>	[ui]

G. later [ei] became [ai]; [ei] > [ai]

Phonetic Rule Elements

[ei]

>

[ai]

Phonetic Rule Examples

eiθ > aiθ	ei > ai	ᴱ✶eχtă- > G. aith¹	✧ GL/18
eiθ > aiθ	ei > ai	ᴱ✶ektĭ > G. aith²	✧ GL/18
eiθaθ > aiθaθ	ei > ai	ᴱ✶eχt·taþ· > G. aithos	✧ GL/18
eiθi > aiθi	ei > ai	‽ᴱ✶ektī > G. †aithi	✧ GL/18
eiθl > aiθl	ei > ai	ᴱ✶ektḷ > G. aithl	✧ GL/18
keiθl > kaiθl	ei > ai	ᴱ✶kekt(ǝ)lḗ > G. caithl	✧ GL/25
leis > lais	ei > ai	ᴱ✶leχ-sa > G. lais	✧ GL/53
meiðan > maiðan	ei > ai	ᴱ✶megđana > G. maidhon	✧ GL/56
meis > mais	ei > ai	ᴱ✶meχse > G. †mais	✧ GL/56
seiðan > saiðan	ei > ai	ᴱ✶sek’·ðana > G. Saidhon	✧ GL/66