Examples: cartography card archaeology archetype monarchy legal loyal purse personal cinema kinase car carpenter hippopotamus Mesopotamia dative data date
...
Finnish arka
← Estonian arg (cognate)
← Proto-Finnic *arka (inherited)
← Proto-Germanic *argaz (derived)

→ Finnish hellä (link)
→ Finnish arkailla (affix)
→ Finnish aristaa (suffix)
→ Finnish arasti (suffix)
→ Finnish arkajalka (compound)
→ Finnish valonarka (compound)
→ Finnish hallanarka (affix)
→ Finnish arastaa (affix)
→ Finnish arkuus (suffix)
→ Finnish tulenarka (compound)
→ Finnish arkala (suffix)
→ Finnish arkaluonteinen (affix)
→ Finnish arkaluontoinen (affix)
→ Finnish arkatunteinen (affix)
→ Finnish tuulenarka (affix)
→ Finnish pakkasenarka (affix)
→ Finnish ihmisarka (affix)
→ Finnish arkakatseinen (affix)
→ Finnish arkanahkainen (affix)
→ Finnish kylmänarka (affix)
→ Finnish omantunnonarka (affix)
→ Finnish palonarka (affix)
→ Finnish vilunarka (affix)