The Spanish word 'indígena' (meaning 'indigenous') comes from the Latin word 'indigena' with the same meaning. The Latin word was formed by combining two elements: 'indu-' meaning 'within, inside' and '-gena' meaning 'born, produced'. So literally, an 'indígena' is someone who is 'born within' or 'produced inside' a particular place - in other words, a native or indigenous person.

The word 'indígena' is relatively unique in Spanish and doesn't have many common related words that would be simpler for beginners. However, you might encounter it in compound forms like 'indígena-americano' (Native American) or in the adjective form 'indígeno/a'.

The English word 'indigenous' is directly related to Spanish 'indígena', as they both come from the same Latin root 'indigena'. The English word maintained a very similar meaning but took on a more Anglicized spelling and pronunciation. Another related English word is 'indigene' (a native), though this is less commonly used. The '-gen' element from the Latin '-gena' (meaning 'born, produced') appears in many English words like 'generate', 'genesis', and 'genetic', all relating to production or origin.