Portuguese decair

← Catalan decaure (cognate)

← Spanish decaer (cognate)

← French déchoir (cognate)

← Italian decadere (cognate)

← Latin de- (derived)

← Latin cadere (mention)

← Latin decido (mention)

← Portuguese cair (mention)

→ Spanish decaer (cognate)

→ French déchoir (cognate)

→ Italian decadere (cognate)

→ Portuguese decaimento (suffix)