Catalan tronar

← Spanish tronar (cognate)

← French tonner (cognate)

← Proto-Indo-European *(s)tenh₂- (derived)

← Italian tuonare (cognate)

← Latin tonāre (inherited)

← Latin tonō (mention)

← Latin tonitrus (mention)

← Latin (mention)

← Occitan tronar (cognate)

← Old Occitan (inherited)

← Portuguese troar (cognate)

→ Catalan tronera (affix)

→ Occitan tronar (cognate)