The Spanish word 'auroral' comes from combining the Spanish noun 'aurora' (meaning 'dawn') with the adjective suffix '-al'. The Spanish 'aurora' itself comes directly from the Latin word 'aurora', which also meant 'dawn'. The suffix '-al' is added to create an adjective meaning 'relating to or pertaining to dawn'.

A simpler related Spanish word is 'aurora', meaning 'dawn' or 'daybreak'. While 'auroral' is the adjective form describing things relating to dawn, 'aurora' is the more common noun form that directly refers to the dawn itself.

English speakers might recognize this word's connection to 'aurora' in English, which can refer to dawn or to the spectacular light displays in the sky near the Earth's poles (Aurora Borealis and Aurora Australis). The English word shares the same Latin ancestor 'aurora'. We also use the adjective form 'auroral' in English in the same way as Spanish, particularly when discussing these atmospheric phenomena.