The Spanish word 'dios' (meaning 'god') comes from the Latin word 'deus', which had the same meaning. Going even further back, 'deus' developed from the Archaic Latin form 'deivos', also meaning 'god'. The evolution from 'deivos' to 'deus' to 'dios' shows a typical pattern of sound changes as the word passed from Archaic Latin through Classical Latin and finally into Spanish.

Some common Spanish words related to 'dios' include 'divino' (divine), 'divinidad' (divinity), and 'adiós' (goodbye, which literally means 'to God'). These words all share the same religious and spiritual connection to their root meaning.

English speakers might recognize the connection between 'dios' and words like 'divine', 'deity', and 'deist'. These English words all come from the same Latin root 'deus'. Even the word 'Tuesday' (literally 'Tiw's day' in Old English) is distantly related, as it comes from the same Indo-European root that meant 'god' or 'deity'.