Spanish firme

← Proto-Indo-European (inherited)

← Proto-Indo-European *dʰer- (mention)

← Proto-Italic *fermos (inherited)

← Latin firmus (inherited)

← Old Spanish firme (inherited)

→ Spanish firmeza (affix)

→ Spanish firmemente (suffix)

→ Ido ferma (borrowed)

→ Zoogocho Zapotec firm (borrowed)