Examples: cartography card archaeology archetype monarchy legal loyal purse personal cinema kinase car carpenter hippopotamus Mesopotamia dative data date
...
Vietnamese rơi
Khmer រោយ (cognate)
Proto-Mon-Khmer *ruj (inherited)
Proto-Mon-Khmer *ruuj (mention)
Proto-Mon-Khmer *ruəj (mention)
Proto-Mon-Khmer *rəj (mention)
Proto-Mon-Khmer *rəəj (mention)

Vietnamese bỏ rơi (compound)
Vietnamese rơi rụng (compound)
Vietnamese tờ rơi (affix)