Examples: cartography card archaeology archetype monarchy legal loyal purse personal cinema kinase car carpenter hippopotamus Mesopotamia dative data date
...
Russian семь
← Proto-Indo-European *septḿ̥ (inherited)
← Proto-Slavic *sedmь (inherited)

→ English seven (cognate)
→ Latvian septiņi (cognate)
→ Russian семилетний (affix)
→ Russian семиугольник (affix)
→ Russian семилетие (affix)
→ Russian семиструнный (affix)