“纵火犯”的英语可以翻译为：[法] arsonist，fire-raiser ...

把打火机交给纵火犯简直是不可理喻。Giving an arsonist a lighter is beyond a joke.工厂在纵火犯引起的火灾中烧毀了.The factory was destroyed in a fire started by arsonists.纵火犯在两小时内就被警察抓住了.Within two hours the arsonist was taken up by the police....