exterminator       
noun [ C ] uk/ɪkˈstɜː.mɪ.neɪ.tər/ us/ɪkˈstɝː.mə.neɪ.t̬ɚ/
 根除者;灭绝者;消灭者
a person whose job is to kill a particular type of animal that is not wanted in a place
  He is employed full-time as a rabbit exterminator.  他是一个全职的灭兔专家。 
 She and her husband work together as exterminators.  她和她的丈夫一起从事灭虫工作。 
 See: exterminate
 - More examples
 - Some residents hired exterminators to help control the beaver population.
 - The exterminator will be in the building on Saturday.
 - A new rodent exterminator has been hired.