Definition
"Undiscipline" is an uncommon word essentially synonymous with indiscipline: a lack of discipline, self-control, or order. It suggests a state of being unruly or unmanaged. Think of it as a deficit in the habits and structures that promote success. Unlike spontaneity, undiscipline often leads to negative outcomes. It's essentially a non-standard version of indiscipline, carrying the same connotations. Few people use this word.