The word 哭闹 is formed by combining the character 哭, meaning "to cry", which incorporates the radical 口 (mouth) to relate to vocal expression, and the character 闹, meaning "to make noise", which includes the radical 门 (gate) and the component 市 (market) to suggest bustling noise. Together, they create a compound where the meanings merge to denote the act of crying loudly and making a fuss, such as in a tantrum.