出处：按学科分类—语言、文字 中国对外翻译出版公司《汉英成语词典》第183页（254字）
用恶毒言语诽谤别人，使人受到伤害，例对朋友的缺点、错误要诚恳坦率地提出劝告，不应恶语中伤。
There is no need to use vicious words to condemn the mistakes and failures your friends make．Speak to them sincerely and frankly and help them to make amends．