The spelling of the word "decadencies" can be a bit tricky. It is pronounced as /dɪˈkeɪdənsiz/ and refers to the quality of being degenerate or morally corrupt. The word is derived from the noun "decadence," which denotes a state of moral decay or decline. The extra "e" before the final "cies" is added to preserve the "s" sound, making it easy to pronounce. Decadencies can refer to various forms of moral decay or corruption, such as moral decay in a society, government, or individual.
There is no word decadencies in the English language. It appears to be a derived form of the noun decadence. The word decadence derives from the Latin word decadentia, which is derived from the Latin verb decadere meaning to decay or to fall away.