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

→ Czech ob- (inherited)
→ Czech obrat (derived)
→ Polish opieka (prefix)
→ Romanian obârșie (affix)
→ Russian обруч (mention)
→ Serbo-Croatian ob- (inherited)
→ Serbo-Croatian об- (inherited)
→ Serbo-Croatian odoljeti (mention)
→ Serbo-Croatian odoleti (mention)