The Spanish word 'campanero' (meaning 'bell-ringer') comes from combining the Spanish word 'campana' ('bell') with the occupational suffix '-ero'. The word 'campana' itself traces back to the Latin word 'campana' (also meaning 'bell'), which is believed to have originated from Campania, a region in Italy that was historically known for its bell production.

A simpler related Spanish word is 'campana' (bell), which is very commonly used. You might hear it in phrases like 'la campana de la iglesia' (the church bell) or 'tocar la campana' (to ring the bell). The connection between 'campana' and 'campanero' is straightforward - a 'campanero' is simply someone who rings or manages the 'campana'.

While English 'campaign' and 'campanile' (bell tower) are related to the same Latin root, they took different semantic paths. 'Campaign' originally referred to the plains of Campania where armies would conduct military operations, while 'campanile' maintained the connection to bells. The Spanish 'campanero' shares a more direct connection with these bell-related terms.