The Spanish word 'herradura' (horseshoe) comes from the verb 'herrar' meaning 'to shoe a horse' combined with the Latin suffix '-ura' which indicates the result of an action. The verb 'herrar' itself derives from the Latin word 'ferrum' meaning 'iron'. This etymology makes perfect sense since a horseshoe is literally the result (indicated by -ura) of shoeing a horse with an iron implement.

Some related Spanish words that might be easier to remember include 'hierro' (iron), 'herrero' (blacksmith), and 'herrería' (blacksmith's shop). All these words share the same Latin root 'ferrum' and relate to working with iron. A 'herrero' is someone who works with 'hierro' (iron), and naturally one of their main tasks historically was making 'herraduras' (horseshoes).

English speakers might recognize the connection to words like 'ferrous' (containing iron), 'ferric' (relating to iron), and 'ferrite' (a type of iron-based material). These words all come from the same Latin root 'ferrum' that gave rise to 'herradura'. The initial 'f' in Latin often changed to 'h' in Spanish (a common sound change), which is why Spanish words related to iron start with 'h' while English words derived from Latin maintain the 'f'.