The Spanish word 'brujería' (meaning 'witchcraft') comes from combining the word 'bruja' (meaning 'witch') with the suffix '-ería', which forms abstract nouns. The word 'bruja' itself evolved from Medieval Spanish 'bruxa', which can be traced back to the Proto-Celtic word 'brixta', meaning 'magic spell'. This Celtic origin is interesting as it shows the influence of pre-Roman cultures on the Spanish language.

A simpler and more common related Spanish word is 'bruja' (witch), which is the base word from which 'brujería' is derived. The suffix '-ería' is also found in many common Spanish words that describe places or practices, such as 'panadería' (bakery) or 'carnicería' (butcher shop).

While there aren't direct English cognates from the same Celtic root, English speakers might find it interesting that the Spanish suffix '-ería' serves a similar function to English endings like '-ery' or '-craft' (as in 'witchcraft' itself). This parallel might help English speakers understand how '-ería' works to form abstract nouns or place names in Spanish.