His behavior in public became a total scandal for the whole family.

scandal 是名词，来自希腊语 skandalon（绊脚石），指"引起公众愤慨或震惊的不当行为或事件"，通常涉及道德败坏或违法行为。在句中指"让整个家族蒙羞的丑闻"。