"Overluxuriancy" is a rarely used and complex word, which means excessive luxury or extravagance. Its spelling conforms to the rules of English pronunciation. According to the International Phonetic Alphabet (IPA), it is pronounced as /əʊvəˈlʌks(j)ʊriːənsi/. The word is derived from the combination of "over" meaning "too much," "luxury" meaning "expensive or unnecessary indulgence," and "iency" meaning "quality or state of being." Its unusual spelling, pronunciation, and meaning make it an intriguing word to use in formal writing.