Examples: cartography card archaeology archetype monarchy legal loyal purse personal cinema kinase car carpenter hippopotamus Mesopotamia dative data date
...
Old Armenian արտասուք
← Proto-Indo-European *draḱu- (inherited)
← Proto-Indo-European *dáḱru (mention)
← Old Armenian (suffix)
← Old Armenian ք (suffix)

→ Armenian արտասուք (mention)
→ Armenian արցունք (mention)
→ Old Armenian արտօսր (mention)
→ Old Armenian արտասու (back-formation)
→ Old Armenian արտասու (mention)