Examples: cartography card archaeology archetype monarchy legal loyal purse personal cinema kinase car carpenter hippopotamus Mesopotamia dative data date
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Russian нощь
Old Church Slavonic нощь (borrowed)
Old Church Slavonic ⱀⱁⱋⱐ (mention)
Proto-Indo-European *nókʷts (inherited)
Russian ночь (doublet)
Proto-Slavic *noťь (derived)

Russian ночь (doublet)