Examples: cartography card archaeology archetype monarchy legal loyal purse personal cinema kinase car carpenter hippopotamus Mesopotamia dative data date
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Vietnamese khói
Proto-Vietic *k-hɔːjʔ (inherited)
Proto-Vietic *kʰɔːjʔ (mention)

Vietnamese làn (link)
Vietnamese ống khói (compound)
Vietnamese khói lửa (compound)