Abbreviations

CB
Common Bantu
CS
Comparative Series (Guthrie, 1967–1971)
PS
Partial Series (Guthrie, 1967–1971)
EIA/EIW
Early Iron Age/Early Iron Working
ER
East Ruvu
NECB
Northeast-Coastal Bantu
PESB
proto-Eastern-Savanna Bantu
PK
proto-Kati
PM
proto-Mashariki
PNECB
proto-Northeast-Coastal Bantu
PR
proto-Ruvu
PSA
proto-Sabaki
PW
proto-Wami
PSC
proto-Southern Cushitic
TIW
Triangular Incised Ware
WR
West Ruvu
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Symbols

/ /
phonemic notation
>
becomes, goes to (diachronic shift)
<
comes from, derives from (diachronic shift)