Examples: cartography card archaeology archetype monarchy legal loyal purse personal cinema kinase car carpenter hippopotamus Mesopotamia dative data date
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Esperanto feko
German fäkal (derived)
English fecal (derived)
Spanish fecal (derived)
French fécal (derived)
Ido feko (borrowed)
Italian fecale (derived)
Latin faecalis (derived)
Latin faex (mention)
Russian фека́льный (derived)

Esperanto fek (mention)
Esperanto fekulo (affix)
Esperanto fekafiŝi (compound)