绵：丝棉。棉絮里面藏着针。形容柔中有刚。也比喻外貌和善，内心刻毒。
(1) [ruthless character behind a gentle appearance is like a needle hidden in silk floss](2) 喻外表看来温柔,软弱,实则内心刻毒强硬(3) 形容柔弱中蕴刚强