Vietnamese rỗng

← Khmer រូង (cognate)

← Proto-Mon-Khmer *ruŋh (inherited)

← Proto-Mon-Khmer *ruuŋ() (mention)

← Proto-Mon-Khmer *rəŋ() (mention)

← Mon သြိုၚ် (cognate)

← Old Mon sruṅ (cognate)

→ Vietnamese thùng rỗng kêu to (mention)