The Spanish word 'hada' (meaning 'fairy') has an interesting etymology that traces back to Latin. It originated from the Latin word 'fata', which was the plural form of 'fatum' meaning 'fate' or 'destiny'. This Latin word 'fatum' itself derived from 'fari', meaning 'to speak' or 'to declare', reflecting the ancient belief that spoken words could determine one's destiny.

The semantic evolution from 'fates' to 'fairy' makes sense when we consider that in Roman mythology, the Fates (Parcae) were supernatural beings who determined the course of human lives. Over time, as the word evolved into Spanish, this concept of supernatural feminine beings merged with other folkloric traditions, eventually coming to refer to the magical creatures we now know as fairies.

A related Spanish word is 'fatal' (meaning 'fatal' or 'deadly'), which comes from the same Latin root 'fatum'. While 'hada' evolved to represent magical beings, 'fatal' retained the connection to destiny, particularly in reference to death or doom.

Several English words share the same Latin ancestry as 'hada'. The most obvious ones are 'fate' and 'fatal', both from Latin 'fatum'. The word 'fable' also comes from the Latin 'fari' (to speak), as does 'infant' (literally meaning 'not speaking' or 'incapable of speech'). Understanding these connections can help remember that 'hada' is related to the concept of supernatural forces that could speak or declare one's destiny.