Russian глупый

← Bulgarian глупав (cognate)

← Icelandic glópur (mention)

← Old Norse glópr (mention)

← Serbo-Croatian глу̏пав (cognate)

← Serbo-Croatian glȕpav (mention)

← Slovak hlúpy (cognate)

← Slovene glup (cognate)

← Proto-Slavic *glupъ (inherited)

→ Russian глупыш (affix)

→ Slovene glup (cognate)