Examples: cartography card archaeology archetype monarchy legal loyal purse personal cinema kinase car carpenter hippopotamus Mesopotamia dative data date
...
Polish gdy
← Proto-Slavic *kogъda (inherited)
← Old Polish kiegdy (inherited)

→ Czech kdy (cognate)
→ Polish jak (mention)
→ Polish gdyby (compound)
→ Polish gdyż (suffix)
→ Polish niegdyś (affix)
→ Russian когда (mention)