| 6 Afro-Asiatic | 6.1.1 Proto-Omotic to North Omotic | e(ː) → i(ː) / #C[+sibilant]_{d,n,r}
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| 6.2.2 Proto-Erythrean to Proto-North Erythrean | eː oː → i u
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| 6.2.2.1.19 Biblical Hebrew to Modern Israeli Hebrew | {e(ː),ɛ} → ɛ
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| 7 Algonquian | 7.1 Proto-Algonquian to Kennebec River Abenaki | oː aː eː iː → o ɔ̃ a i
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| 7.2 Proto-Algonquian to St. Francis Abenaki | oː eː iː → o a i
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| 7.3.1 Proto-Arapaho-Atsina to Arapaho | eː → ei / j_
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| 7.4 Proto-Algonquian to Blackfoot | {jiː,ja,ahi} {owaː,awa,awe} awi {iːwa,eːwa,aji,aje,ani} → i oː o(ji) iː / C_C
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| {eː,iː} → i
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| 7.6 Proto-Algonquian to Northern East Cree | e eː → i aː
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| ʃjeː → seː
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| 7.7 Proto-Algonquian to Southern East Cree | ʃjeː → ʃeː
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| 7.8 Proto-Algonquian to Plains Cree | ʃjeː → seː
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| 7.9 Proto-Algonquian to Swampy Cree | ʃjeː → ʃeː
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| 7.10 Proto-Algonquian to Woods Cree | e(ː) → i(ː)
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| 7.12 Proto-Algonquian to Menominee | e(ː) i → æ(ː) e
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| {wiː,jiː,weː,jeː,wæː,jæː} {wi,ji,we,je,wæ,jæ} → iː i / C_
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| 7.14 Proto-Algonquian to Mi’kmaq | eːk → oχ / _w
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| o(ː) waː eː iː → u o e i
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| 7.15 Proto-Algonquian to Ojibwe | jeː → iː / C_
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| 8 Altaic | 8.5.2 Proto-Turkic to Sakha | {e,ɤ}ː → je (the second one is conjectured based on my admittedly sparse knowledge of Turkish; I can only guess that 〈ė〉 is some sort of back unrounded vowel)
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| 14 Elamo-Dravidian | 14.3.1 Standard Tamil to Colloquial Tamil | aː eː iː oː uː → a ɛ i o u / _#
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| {om,on} {em,en} {oːm,oːn} {eːm,eːn} → ɔ̃ ɛ̃ õ ẽ
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| i(ː) e(ː) → u(ː) o(ː) / {m,v,p}_C̣
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| — i(ː) e(ː) → u(ː) o(ː) / _ɭ
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| 17 Indo-European | 17.1.1 Proto-Indo-European to Gheg Albanian | eː iː oː uː → o i e {y,i}
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| 17.1.2 Proto-Indo-European to Tosk Albanian | eː iː oː uː → o i e {y,i}
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| 17.2.2 Common Anatolian to Luwian | {ɛ,e}ː æː → iː aː
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| 17.2.3 Common Anatolian to Lycian | {ɛ,e}ː o æː → iː e aː
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| 17.2.4 Common Anatolian to Lydian | o(ː) eː æː → a(ː) iː aː
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| 17.3.1 Proto-Indo-European to Artsakh Armenian | {e,i}ː {u,o}ː → i u
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| 17.3.2 Proto-Indo-European to Erevan Armenian | {e,i}ː {u,o}ː → i u
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| 17.3.3 Proto-Indo-European to Istanbul Armenian | {e,i}ː {u,o}ː → i u
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| 17.3.4 Proto-Indo-European to Kharpert Armenian | {e,i}ː {u,o}ː → i u
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| 17.3.5 Proto-Indo-European to Sebastia Armenian | {e,i}ː {u,o}ː → i u
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| 17.3.6 Proto-Indo-European to Southeast Armenian | {e,i}ː {u,o}ː → i u
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| 17.3.7 Proto-Indo-European to Southwest Armenian | {e,i}ː {u,o}ː → i u
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| 17.4.1 Proto-Indo-European to Avestan | e eː → a aː
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| 17.5 Proto-Indo-European to Proto-Celtic | — eː → iː
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| 17.5.1 Proto-Indo-European to Old Irish | eː → iː / ! _{i,u}
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| eː → ia / _{#,Cʲ} when stressed; “ai and oi remain, but are written as <ae ai oe oi> seemingly randomly”
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| 17.6 Proto-Indo-European to Dacian | eː → aː
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| 17.7 Proto-Indo-European to Common Germanic | eː → æː
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| eːi {oːi,aːi} → eː oː (?)
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| 17.7.2.1.2 Old English to Kentish Middle English | eɑ eːɑ eo eːo → ɑ ɛː e eː
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| {æːj,e(ː)j} → ej
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| eːɑw iːw → ew ju
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| 17.7.2.1.3 Old English to Midlands Middle English | eɑ eːɑ eo eːo → ɑ ɛː e eː
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| {æːj,e(ː)j} → ej
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| eːɑw iːw → ew ju
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| 17.7.2.1.4 Midlands Middle English to Early Modern English | eː oː → eɪ oʊ / ! _ɹ
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| 17.7.2.1.6 Early Modern English to Australian English | ɜːɹ ɑːɹ ɔːɹ eːɹ oːɹ iːɹ uːɹ → ɜː ɑː ɔː ɛə ɔə ɪə ʊə / syllable-finally
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| 17.7.2.1.7 Early Modern English to British English | ɜːɹ ɑːɹ ɔːɹ eːɹ oːɹ iːɹ uːɹ → ɜː ɑː ɔː ɛə ɔə ɪə ʊə / syllable-finally
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| 17.7.2.1.8 Old English to Northern Middle English | eɑ eːɑ eo eːo → ɑ ɛː e eː
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| {æːj,e(ː)j} → ej
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| eːɑw iːw → ew ju
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| 17.7.2.1.9 Early Northern Middle English to Scots | — iː eː ɛː aː oː uː {øː,yː} → əi i {i,e} e o u ø
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| 17.7.2.1.10 Old English to Scots | æː(ɑ) eː(o) → ɛ iː
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| 17.7.2.1.12 Old English to Southern Middle English | eɑ eːɑ eo eːo → ɑ ɛː e eː
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| {æːj,e(ː)j} → ej
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| eːɑw iːw → ew ju
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| 17.7.2.2 West Germanic to Old Low Franconian | eː oː → ie uo
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| 17.7.2.2.3 Modern Dutch to Polder Dutch Vowel Shift | eː øː oː → ɛi œy ɔu
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| 17.7.2.3 Middle High German to Standard German | e(ː) i → ø(ː) y / _C[+ affricate]
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| e(ː) i → ø(ː) y / _{P,l,ʃ} (sporadic?)
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| e(ː) i → ø(ː) y / {P,l,ʃ}_ (sporadic?)
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| 17.7.3 Common Germanic to Proto-Norse | {æ,e}ː(w(a)) → aː
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| {æ,e}ːuː {æ,e}ːiː → eu ai
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| w{o,u}ːwuː j{e,i}ːjiː → uː iː
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| 17.7.3.1 Proto-Norse to Old Norse | BːB aː{o,a,æ,e} {æ,e}ː{æ,e}ː {æ,e}ːi iːEː → oː aː eː eː iː
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| {(j)u,we}ː {o,ɒ}ː aː au → yː øː æː æy
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| {a,æ,e}ːhiː → æː
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| e(ː){B,i(ː)} → e(ː)u / {v,w}_
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| eː{Bː,i(ː)} → joː / _C[+ alveolar]#
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| eː{Bː,i(ː)} → juː
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| eː → e / Ḱ_
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| eː j → e ∅ / Cw_
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| 17.7.3.1.1 Old Norse to Early Icelandic | u o a øː eː y i → ʏɪ oi ai øi ei yː iː / _j
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| u oː aː ʏɪ {y,i} {y,i}ː æː eː ey → ʏ ou au ai y ɪ i je ei
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| 17.7.3.1.2 Old Norse to Orkney Norn | u a e eː → ʌ ɑ ɪ ɛ / _Cː
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| 17.7.3.1.3 Old Norse to Shetland Norn | eː → {ɒ,ə} / w_
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| e eː → {æ,ɛ,e} {(j)ɛ,je}
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| 17.7.4 Common Germanic to Vandalic | eː → i / unstressed
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| 17.8.2 Proto-Indo-European to Attic Greek | eː → iː / _C
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| eː → iː / _V
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| 17.8.3 Proto-Indo-European to Boeotian Greek | {eː,ej} ɛː ɑ(ː)j {oj,ɔːj} → iː eː ɛː {y,ø}
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| 17.8.8 Proto-Indo-European to Ionic Greek | eː → iː / _V
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| 17.9 Proto-Indo-European to Hittite | e(ː) → a(ː) / _h2
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| e(ː) → a(ː) / h2_
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| e(ː) → o(ː) / _h3
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| e(ː) → o(ː) / h3_
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| — e(ː) → a(ː) / _R “sometimes??”
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| — e(ː) → a(ː) / “when unstressed?”
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| 17.11 Proto-Indo-European to Proto-Slavic | e(ː)i → i
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| {a(ː)u,o(ː)u} e(ː)u → u ju
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| {e(ː),i(ː)} {a(ː),o(ː),u(ː)} → ẽ õ / _N$
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| 17.12.1.1.1 Classical Latin vs. Vulgar Latin | {i,eː,oi} → e
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| “In contrast, Romanian exhibits u, uː → u (and ultimately also ɔ, oː → o); and Sardinian and African Latin underwent a straight merger of the vowels by length without considering quality (e, eː → e; i, iː → i; u, uː → u; etc.)”
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| 17.12.1.1.2 Latin to Catalan | {i,eː} e → {e,ɛ} {ɛ,e} / stressed
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| {i,eː,e} → e / _%”V
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| {i,e(ː),ae} → ∅ / _(C)#
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| 17.12.1.1.3 Latin to French | — {eː,i,oe} → é
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| — {e(ː),i,ae,oe} → e
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| — {e(ː),i,ae,oe} → e
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| 17.12.1.1.5 Latin to Portuguese | iː {i,eː} e → i e ɛ / stressed
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| iː {i,e(ː)} → i e / _%”V
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| {i(ː),e(ː),ae} → e / _#
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| 17.12.1.1.8 Latin to Romanian | — eː,i,oe → e
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| — {e(ː),i,ae,oe} → e
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| — {e(ː),i,ae,oe} → e / _#
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| 17.13 Proto-Indo-European to Proto-Tocharian | (h1)e (h1)eː → jə jɛː / #_
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| Ce Ceː → Cʲə Cʲɛ
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| 27 Mayan | 27.1 Proto-Mayan to Ch’olan | aː eː oː → ɨ i u
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| 27.9 Proto-Mayan to Tzeltalan | aː eː oː → ɨ i u
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| 33 Penutian | 33.3.1 Proto-Yokuts to General Yokuts | eː əː → e ə (as a result of ablaut)
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| 37 Siouan-Iroquoian | 37.1.1 Proto-Iroquoian to Cherokee | a(ː)wẽ(ː) → a(ː)ma(ː)
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| ẽ(ː) õ(ː) → o(ː) ʌ̃(ː)
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| 37.1.2.1 Proto-Northern Iroquoian to Cayuga | e(ː) → ẽ / _ẽ(ː)
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| 37.1.2.2.1 Huron to Wyandot | ẽ(ː) õ(ː) o(ː) → ɛ̃(ː) ɔ̃(ː) u(ː)
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| 37.1.2.4 Proto-Northern Iroquoian to Proto-Mohawk-Oneida | ẽ(ː) õ(ː) → ʌ̃(ː) ũ(ː)
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| 37.1.2.5 Proto-Northern Iroquoian to Seneca | ẽ(ː) → e(ː) / _{e(ː),o(ː)
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| ẽ(ː) õ(ː) → ɛ̃(ː) ɔ̃(ː)
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| 37.1.2.6 Proto-Northern Iroquoian to Tuscarora | {ẽ(ː),õ(ː)} → ə̃(ː)
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| e(ː) → ɛ(ː)
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| 42 Uralic | 42.1.1.1.1 Proto-Finnish to Standard Finnish | eː øː oː → ie yø uo
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| 42.1.2 Proto-Finnic to Livonian | eː øː oː ɤ(ː) → iːe yːø uːo ɨ(ː)
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| eː oː → je wo
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| 46 Vowel Shifts | 46.4 Polder Dutch Vowel Shift | eː øː oː → ɛi œy ɔu
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| 46.5 Old English-to-Scots Vowel Shifts | iː eː ɛː aː oː uː {øː,yː} → əi i {i,e} e o u ø
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| 46.7 Great Vowel Shift (English) | eː oː → iː uː
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| ɛː → eː → iː
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| aː ɔː → ɛː oː → eː ow → ej (əw)
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| 46.8 Greek Vowel Shift | eː ɛː → iː eː
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| eː → iː
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| 46.10 Late Proto-Finnic to Savonian Vowel Shift | eː øː oː → ie yø uo
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| 46.13 Old Norse to Faroese Vowel Shift | eː → ɛa “(except Suðuroy → eː)” / a “(except Suðuroy → ɛ)”
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| 46.14 Pre-Slavic Vowel Changes | eː → æ
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