Examples: cartography card archaeology archetype monarchy legal loyal purse personal cinema kinase car carpenter hippopotamus Mesopotamia dative data date
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Esperanto koni
German kennen (derived)
English know (mention)
French connaître (mention)

Esperanto rekoni (affix)
Esperanto konigi (affix)
Esperanto nekoni (affix)
Esperanto ekkoni (affix)
Esperanto koniĝi (affix)