French écume

← Old French escume (inherited)

← Proto-Germanic *skūmaz (derived)

← Latin spūma (inherited)

→ English scum (cognate)

→ French écumer (affix)

→ French écumeux (suffix)

→ Galician escuma (cognate)

→ Interlingua scuma (derived)

→ Walloon schome (cognate)