Undisciplined and Wet behind ears

Undisciplined adjective - Not subjected to discipline.

Wet behind ears and undisciplined are semantically related In some cases you can use "Wet behind ears" instead an adjective "Undisciplined".

Undisciplined and wet behind ears are semantically related in inexperienced topic. Sometimes you can use "Undisciplined" instead an adjective phrase "Wet behind ears", if it concerns topics such as unskilled.