Sentence:  "The <WSD>trickster</WSD> is one of the oldest and most widespread of mythological and literary figures....As the name implies, the <WSD>trickster</WSD> is, on one level—probably the most important—an amoral practical joker who wanders about playing pranks on unsuspecting victims...With all the fluctuations, certain things about the <WSD>trickster</WSD> are predictable: he is always a wanderer, always hungry, and usually oversexed." / <WSD>"Tricksters</WSD> abound in folktales...." 
Meaning of the word marked with <WSD> tags:  Any of numerous figures featuring in various mythologies and folk traditions, who use guile and secret knowledge to challenge authority and play tricks and pranks on others; any similar figure in literature.