Examples: cartography card archaeology archetype monarchy legal loyal purse personal cinema kinase car carpenter hippopotamus Mesopotamia dative data date
...
English duo
English two (doublet)
French duo (derived)
Proto-Indo-European *dwóh₁ (derived)
Italian duo (derived)
Latin duo (derived)

English two (doublet)
English pair (link)
English duolocal (prefix)
English duodecimal (prefix)
English duologue (confix)
English duodecillion (prefix)
English duotheistic (prefix)
English duotheism (prefix)
English duoplural (prefix)
English duobinary (prefix)
English duoliteral (prefix)
English dufoil (compound)
English duovirus (mention)
English duograph (confix)
English duotone (prefix)
English duotype (confix)
English duotensor (prefix)
English duosyllable (prefix)
English duophonic (confix)
English duospace (prefix)
English duosyllabic (prefix)
English duotherapy (prefix)
English duoprism (prefix)
English duotrigintillion (prefix)
English duocolor (prefix)
English -dutant (affix)