| 11 Northeast Caucasian | 11.1.3 Proto-Avar-Andic to Avar | ts tsː tsʼ tsːʼ dz → sh ts tʃʼ ts(ː)ʼ tsʼ
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| 11.2 Proto-Northeast Caucasian to Dargi | {tsː,st} tsːʼ dz stː → ts z tsː s
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| 11.3 Proto-Northeast Caucasian to Khinalug | {tsː,st} {tsːʼ,dz} → ts tsʼ
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| 11.5.1 Proto-Lezgic to Agul | {ts,st} tsː tsːʼ stː dz → {s,ts} {ts,tʃ} tː s z
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| 11.5.2 Proto-Lezgic to Archi | {ts,st} tsː tsːʼ stː dz → s {s,ʃ} tsʼ sː ts
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| 11.5.3 Proto-Lezgic to Lezghi | {ts,st} tsː tsːʼ dz → {ʃ,tʃ} tʃ(ʼ) {tʃː,dʒ}
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| 11.5.4 Proto-Lezgic to Rutul | {ts,st} tsːʼ dz → {s,ts} {d,t} z
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| 11.5.5 Proto-Lezgic to Tabassaran | {ts,st} tsː tsːʼ → {s,ts} {ts,tʃ} tsː
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| 11.5.6 Proto-Lezgic to Udi | ts tsː tsʼ tsːʼ dz → {∅,s} tʃ {∅,tsʼ} {tsʼ,tʃʼ} z
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| 11.6 Proto-Northeast Caucasian to Nakh | tsːʼ → tsː
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| 11.7 Proto-Northeast Caucasian to Proto-Tsezic | {ts,st} {tsːʼ,dz} → s ts
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