The Spanish word 'enfado' (meaning 'anger') comes from the verb 'enfadar' ('to anger'), which was formed by combining the Latin prefix 'in-' (meaning 'in, into') with elements derived from Latin 'fatum' ('fate, destiny'). The Latin word 'fatum' itself came from 'fari' meaning 'to speak solemnly', as fate was thought of as something solemnly pronounced or declared.

The semantic evolution from concepts of fate and destiny to anger is interesting - it suggests a development where something decreed by fate became associated with something that causes displeasure or annoyance, eventually leading to the modern meaning of anger or irritation.

Some related Spanish words include 'fatal' (fatal, deadly) and 'fado' (fate, destiny), which both share the Latin root 'fatum'. While 'enfado' evolved to express anger or annoyance, these related words maintained meanings closer to the original Latin sense of fate or destiny.

English speakers might recognize the connection to words like 'fate', 'fatal', and 'fatality', which all come from the same Latin root 'fatum'. While the English words maintained meanings related to destiny and death, the Spanish 'enfado' developed along a different semantic path to express anger or annoyance.