Which state is characterized by a government that is no longer functioning effectively?

A failed state is defined by a government that is unable to maintain control, provide basic services, or uphold law and order, ultimately leading to a breakdown of authority and civil order. This ineffectiveness is evidenced by a lack of infrastructure, widespread corruption, loss of legitimacy among the populace, and the prevalence of violence or civil unrest.

In contrast, a fragile state may still maintain some functioning government aspects but is at significant risk of failing. A successful state is one that functions effectively, ensuring the welfare of its citizens and maintaining stability. An emerging state, while undergoing development or transition, is not characterized by dysfunction but rather by potential for growth and improvement.

Hence, the term "failed state" directly captures the essence of a government that is no longer effective, marking it as the appropriate choice in this context.