The Vietnamese word "bất cẩn" is an adjective that means "careless" or "reckless." It describes a person who does not pay enough attention to what they are doing, which can lead to mistakes or accidents.
In summary, "bất cẩn" is an important word in Vietnamese to describe carelessness. It can refer to actions, decisions, or individuals who do not exercise enough caution, often leading to negative consequences.