Sentence:  "As societies grow <WSD>decadent</WSD>, the language grows <WSD>decadent</WSD>, too. Words are used to disguise, not to illuminate, action: you liberate a city by destroying it. Words are to confuse, so that at election time people will solemnly vote against their own interests." 
Meaning of the word marked with <WSD> tags:  Characterized by moral or cultural decline.