"Prepotences" is a plural form of the uncommon noun "prepotency." It refers to the state or quality of being predominant or powerful. The word is pronounced as /priːˈpəʊt(ə)nsɪz/, with stress on the first syllable and a silent "e" in the second. The "o" is pronounced as a long "o" sound, and the final "s" is pronounced as a voiced "z" sound. This word is often misspelled as "prepotency's" or "prepotencies," however, both alternatives are incorrect.