The Spanish word 'cargador' (meaning 'loader' or 'carrier') comes from the Spanish verb 'cargar' ('to load') combined with the agent suffix '-dor' (which indicates the person or thing that performs an action). The verb 'cargar' itself derives from Vulgar Latin 'carricare' meaning 'to load', which in turn comes from the Latin word 'carrus' meaning 'wheeled vehicle'. This etymology shows how the concept evolved from a wheeled vehicle to the action of loading, and finally to a person or device that does the loading.

Several common Spanish words share this etymology, including the basic verb 'cargar' (to load), 'cargo' (cargo, load), 'carga' (load, burden), and 'descarga' (unload, discharge). All these words maintain the core meaning related to carrying or loading something.

English speakers might recognize the connection to words like 'cargo', 'charge', and 'car', which all ultimately trace back to the same Latin root 'carrus'. While 'car' maintained the meaning of a wheeled vehicle, 'charge' developed various meanings including 'to load' (as in 'charge a battery') and 'to rush forward' (perhaps from the image of a loaded vehicle moving forward). 'Cargo' kept its meaning most similar to the Spanish cognates, referring to goods being transported.