Examples: cartography card archaeology archetype monarchy legal loyal purse personal cinema kinase car carpenter hippopotamus Mesopotamia dative data date
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Russian рубеж
Old Church Slavonic рубежь (link)
Russian рубёж (doublet)
Proto-Slavic *rǫbežь (derived)
Proto-Slavic *rǫbiti (mention)
Proto-Slavic *-ežь (mention)