Lesson54:Instinct or clevernessinsectwagecontaminateThe river was contaminated with waste from the factory.How could those people do that?provocationShe sometimes angers without provocation.I also think she has bad temper.spiderwaspmothantrevulsionHe had a revulsion against his neighbor.Didn't they get along with each other well?hordeuncannyerasepraying mantisentrancedThey were entranced with the performance.