Examples: cartography card archaeology archetype monarchy legal loyal purse personal cinema kinase car carpenter hippopotamus Mesopotamia dative data date
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English forthgo
Old English forþgān (inherited)
German fortgehen (cognate)
English forth (prefix)
English go (prefix)
Middle English forthgon (inherited)
Middle English forthgan (mention)
Proto-Germanic *furþą (inherited)
Proto-Germanic *gāną (mention)
Dutch voortgaan (cognate)
Swedish fortgå (cognate)

English go forth (mention)
English forthgoing (link)