Examples: cartography card archaeology archetype monarchy legal loyal purse personal cinema kinase car carpenter hippopotamus Mesopotamia dative data date
...
Proto-Indo-European *skew-

→ English scum (derived)
→ English skim (derived)
→ English skim (derived(en/id))
→ Faroese skúm (root)
→ Faroese skúm (derived)
→ Old French escumer (mention)
→ Albanian hum (mention)
→ Old Armenian շուք (mention)