con·cuss \kənˈkəs\transitive verb (-ed/-ing/-es) Etymology: Latin concussus, past participle of concutere 1.: shake, agitate, jar; often: to affect with concussion — usually used as a participle < suffered a concussing blow > < unconscious Charlie who was clearly concussed — C.S.Forester > 2.: to force or influence by intimidation : coerce