词根frict+ion词缀，中文意思是n. 不和，分歧摩擦摩擦力
Sara sensed that there had been friction between her children.萨拉感觉到她的孩子们中间出现了摩擦。
Friction between moving parts had caused the engine to overheat.活动部件的摩擦使发动机过热。
