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

→ Persian سوختن (derived)
→ Persian سوگ (derived)
→ Persian سوگند (derived)
→ Ancient Greek κύκνος (derived)
→ Hindi शोकाकुल (root)
→ Pali sukka (inherited)
→ Sanskrit शोक (inherited)
→ Sanskrit शोकाकुल (root)
→ Albanian thek (inherited)
→ Chinese 龜茲 (cognate)