The Spanish word 'depredador' (meaning 'predator') comes from the Latin word 'depraedator' meaning 'plunderer' or 'robber'. This Latin word was formed by combining three elements: the prefix 'de-' (meaning 'down' or 'away'), the root 'praeda' (meaning 'prey' or 'booty'), and the agent suffix '-tor' (which indicates the doer of an action). Over time, as the word evolved from Latin to Spanish, its meaning narrowed from a general 'plunderer' to specifically refer to a predator in the natural world.

Some related Spanish words include 'presa' (prey), which comes from the same Latin root 'praeda'. You can see how these words maintain their predator-prey relationship in modern Spanish. Another related word is 'depredar' (to prey upon), which is the verb form of 'depredador'.

The English word 'predator' is a close cousin to 'depredador', both ultimately coming from Latin 'praeda' (prey). The English words 'prey', 'predatory', and 'depredation' (meaning plundering or pillaging) are all related as well. Notice how the Spanish word retained the 'de-' prefix while the common English word 'predator' dropped it, though we still have the more formal word 'depredator' in English.