Sentence:  <WSD>"Mara</WSD>" means demon, or demonic influence, that hinders the practice of virtue. It may be an external spirit or an aspect of our own imperfect condition. All hindrances on the path to liberation are subsumed under the "four <WSD>maras</WSD>". The first <WSD>mara</WSD> is the <WSD>"mara</WSD> of the aggregates"....The second of the maras is the <WSD>"mara</WSD> of the afflictions", which are the same as the afflictive obstructions. They are identified as a <WSD>mara</WSD> because they precipitate all harmful actions, from malicious gossip to murder....The third <WSD>mara</WSD> is Devaputra, literally "son of a god," an external troublemaker who specializes in interfering with beings who are endeavoring to achieve something positive....The last <WSD>mara</WSD> is the <WSD>"mara</WSD> of death". 
Meaning of the word marked with <WSD> tags:  ("Buddhism") A type of god that prevents accomplishment or success.