nerve

The Spanish word 'nervio' translates to 'nerve' in English. A 'nerve' is a bundle of fibers that transmits impulses of sensation to the brain or spinal cord and impulses from these to the muscles and organs. It's also utilized commonly in the English language to mean 'courage' or 'boldness.' For instance, 'He had the nerve to say that.' would translate to 'Tenía el nervio de decir eso.' in Spanish.