 Etymologically, lunar and spiritual po < pʰak < *phrâk are cognate with bai < bɐk < *brâk "white" (Matisoff 1980, Yü 1981, Carr 1985) .
<coherence>  Etymologically, lunar and spiritual po < pʰak < *phrâk are cognate with bai < bɐk < *brâk "white" (Matisoff 1980, Yü 1981, Carr 1985) .
 Etymologically, lunar and spiritual po < pʰak < *phrâk are cognate with bai < bɐk < *brâk "white" .