Examples: cartography card archaeology archetype monarchy legal loyal purse personal cinema kinase car carpenter hippopotamus Mesopotamia dative data date
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German tüchtig
Danish dygtig (cognate)
English doughty (cognate)
Middle High German tühtec (inherited)
Proto-West Germanic *duhtīg (inherited)
Old High German *tuhtig (inherited)
Dutch duchtig (cognate)

English doughty (cognate)
Danish dygtig (cognate)
German taugen (mention)
German Tüchtigkeit (suffix)
German funktionstüchtig (compound)
German geschäftstüchtig (affix)
German kriegstüchtig (compound)
German untüchtig (prefix)
German ertüchtigen (affix)
German verkehrstüchtig (affix)
German Unducht (mention)
Luxembourgish dichteg (cognate)
Dutch duchtig (cognate)
Swedish duktig (cognate)