Examples: cartography card archaeology archetype monarchy legal loyal purse personal cinema kinase car carpenter hippopotamus Mesopotamia dative data date
...
Old High German un-

→ Old English un- (cognate)
→ German un- (inherited)
→ Faroese ó- (cognate)
→ Old High German unarmherz (affix)
→ Icelandic ó- (cognate)