Proto-Slavic *blǫdъ

→ Czech blud (inherited)

→ Old Church Slavonic блѫдити (inherited)

→ Old Church Slavonic блѫдъ (inherited)

→ Old Church Slavonic блѫдьнъ (inherited)

→ Old Church Slavonic заблѫдити (inherited)

→ Hungarian bolond (derived)

→ Lithuanian blandas (cognate)

→ Macedonian блуд (inherited)

→ Old East Slavic блꙋдъ (inherited)

→ Polish błąd (inherited)

→ Romanian bolând (derived)

→ Russian блуд (inherited)

→ Serbo-Croatian blud (inherited)

→ Serbo-Croatian блуд (inherited)

→ Old Czech blud (inherited)