The Spanish word 'fuga' comes directly from the Latin noun 'fuga', meaning 'flight' or 'escape'. This Latin noun was related to the verb 'fugere' meaning 'to flee', which also gave rise to 'fugare' meaning 'to put to flight'. The word has maintained its core meaning of escape or flight from Latin into modern Spanish.

Some related Spanish words include 'fugarse' (to escape), 'fugitivo' (fugitive), and 'fugaz' (fleeting, brief). All these words share the common theme of fleeing or escaping, with 'fugaz' extending the meaning to describe something that quickly passes or escapes, like a fleeting moment.

English speakers might recognize the connection to words like 'fugitive' (someone who flees), 'refuge' (a place to flee to), and 'centrifuge' (a device that uses spinning force to separate things, making particles 'flee' from the center). The word 'fever' is also distantly related, as it comes from a related Latin word 'febris', possibly connected to the idea of a 'burning' sensation that makes one want to flee from discomfort.