failing
n. countablen. a weakness or a mistake in someone's character or in a system. It is a way to describe a fault that prevents someone or something from being perfect.
n. a weakness or shortcoming in a person's character, or a deficiency in a system or process. Often used to describe a specific flaw rather than a general state of failure.
His biggest failing is that he never listens to advice.
The report highlighted a serious failing in the hospital's safety procedures that led to the accident.
While the candidate possessed immense charisma, his inability to delegate tasks was seen as a significant failing that might hinder his effectiveness in a high-pressure executive role.
Commonly used in the plural form ('failings') when discussing a person's character or a list of systemic errors.