| 6 Afro-Asiatic | 6.2.2.1.7 Classical Arabic to Egyptian Arabic | θ ð → t d / “usually in numbers or cases where a short vowel has been deleted and it’s in contact with another stop, e.g. CA/MSA kaˈθiːr → EA ktiːr”
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| θ ð → s z
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| 6.2.2.1.8 Classical Arabic to Coastal Hadhrami Arabic | θ ð ðˤ → t d dˤ
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| 6.2.2.1.9 Classical Arabic to Wādı̄ Hadhrami Arabic | θ ð ðˤ → t d dˤ
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| 6.2.2.1.13 Classical Arabic to Western Libyan Arabic | θ ð(ˤ) → t d(ˤ)
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| 6.2.2.1.18 Proto-Semitic to Biblical Hebrew | θ θˤ ð ɬ ɬˤ → ʃ ʃˤ z s sˤ
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| 6.2.2.1.19 Biblical Hebrew to Modern Israeli Hebrew | w θ ð ɣ → v t d ɡ (sometimes)
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| 8 Altaic | 8.5.1 Proto-Turkic to Proto-Kypchak | d → ð → j / V_
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| 10 Austronesian | 10.3.5.8.2 Proto-Yunaga to Yunaga 2 | ð → l
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| 10.7.1 Proto-Rukai to Budai Rukai | {v,ʔ} ð → ∅ j
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| 15 Eskimo-Aleut | 15.1 Proto-Eskimo-Aleut to Proto-Aleut | {t,ð} → n / _#
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| ð → t / else
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| 15.2 Proto-Eskimo-Aleut to Proto-Eskimo | ð z → t s
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| 17 Indo-European | 17.7.1 Common Germanic to Gothic | ð → d / C[+ voiced]_
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| β ð ɣ → ɸ θ x / V_(s)#
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| 17.7.2 Common Germanic to West Germanic | β ð ɣ → b d ɡ / {#,”V}_
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| 17.7.2.1.10 Old English to Scots | d~ð → d / V_u
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| d~ð → ð / V_V
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| ð → ∅ / {l,r,V}_C
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| 17.7.2.2.1 Old Low Franconian to Middle Dutch | θ ð → t d
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| 17.7.2.4 High German Cosonant Shift and Umlaut | {θ,ð} → d
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| 17.7.3.1 Proto-Norse to Old Norse | b {w,v} d ð ɡ → p f t θ k / _#
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| ð → ∅ / n_ ! ɡ_
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| ð → ∅ / r_{m,l,ɡ,n}
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| {t,θ,d,ð} → ∅ / n_l
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| {t,θ,d,ð} → ∅ / l_n
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| ðl(ː) ðn(ː) → lː nː
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| V{θ,ð} → Vː / #(C)(C)(C)_{l,r}
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| β ð ɣ → f θ k / _{p,t,k,s}
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| β ð ɣ → b d ɡ / #_
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| β ð ɣ → b d ɡ / {m,n,ŋ,l}_
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| β ð ɣ → v θ h
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| 17.7.3.1.2 Old Norse to Orkney Norn | ð → θ / _#
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| ð → ∅ /{a,E}_
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| ð → d / ! V_V
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| 17.7.3.1.3 Old Norse to Shetland Norn | ð → ∅ / _#
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| ð → d
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| 17.7.4 Common Germanic to Vandalic | θ ð → t d (not a complete change; apparently due to Latin)
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| 17.12.1.1.3 Latin to French | ð → ∅ / _r
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| ð → ∅
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| 17.12.1.1.6 Vulgar Latin to Old Provençal | ð → ∅ / _#
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| ð → t / _s#
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| ð → i / C_
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| ð → i / _C ! _s#
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| ð → z (except in some northern and eastern dialects where → ∅)
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| {t,d} → ð → i / _r
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| ð → ∅ / au_
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| 18 Je-Tupı́-Carib | 18.3.1 Proto-Tuparí to Makuráp | ð nŋʷ → c β / #_V[-nas]
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| ð → {∅,c} / else
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| 18.3.2 Proto-Tuparí to Mekens | {ᵐb,ⁿd,ð} → t / _V[+nas]
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| ð → s / _i
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| ð → h / else
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| 18.3.3 Proto-Tuparí to Tuparí | β ð → ∅ {s,h} / _i
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| ð → h
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| 18.3.4 Proto-Tuparí to Wayoró | ð → (n)d
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| 42 Uralic | 42.1.1 Pre-Finnic to Proto-Finnic | ð → t
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| 42.1.1.1.1 Proto-Finnish to Standard Finnish | ið → j / ”V_V
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| lð rð → lː rː
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| ð → ∅ / ! ”V(X)_
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| θ(ː) ð → ts d (this latter does have some highly sporadic exceptions; additionally, in some dialects these may become {t(ː),h~t} and {r,∅}, respectively)
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| 44 Vasconic | 44.2 Proto-Basque to Basque | ð → some sort of tap distinct from ɾ (Biscayan, Guipuscoan, High Navarrese)
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| d ð → ɟ ʝ / {E,j}_ ? (“some dialects”)
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| d ð → ɟ ʝ / {ʎ,ɲ}_ (Guipuscoan, High Navarrese)
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| eð (→ e ?) → j / #_V
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