Refine : remove impurities or unwanted elements from (a substance), typically as part of an industrial process.Torture : the action or practice of inflicting severe pain on someone as a punishment or in order to force them to do or say something.Extract : remove or take out, especially by effort or force.Imprison : put or keep in prison or a place like a prison.Excruciate : torment (someone) physically or mentally.Synonym of Excruciate is Torture