Examples: cartography card archaeology archetype monarchy legal loyal purse personal cinema kinase car carpenter hippopotamus Mesopotamia dative data date
...
Estonian -u
← Finnish -u (cognate)
← Proto-Uralic *-w (inherited)

→ Estonian elu (affix)
→ Estonian imu (affix)
→ Estonian olu (affix)
→ Estonian mäng (suffix)
→ Estonian kasu (mention)
→ Estonian arutelu (affix)
→ Estonian tasu (affix)
→ Finnish -u (cognate)