Sentence:  Together, with the help of the drunkard Haymitch (Woody Harrelson), the only District 12 citizen ever to win the Games, they challenge tributes that range from <WSD>sadistic</WSD> volunteers to crafty kids like the pint-sized Rue (Amandla Stenberg) to the truly helpless and soon-to-be-dead. 
Meaning of the word marked with <WSD> tags:  Delighting in or feeling pleasure from the pain or humiliation of others.