Which of the following words best describes a situation where someone loses strength?

The word "languish" accurately captures a situation where someone loses strength, as it refers to a state of weakness or suffering from a lack of vitality. When a person or thing languishes, they typically experience a decline in energy or capability, often feeling helpless or unproductive. This term conveys not just a physical sense of weakness but also an emotional or motivational decline, which makes it particularly suitable for describing a scenario where strength is diminished.

In contrast, the other words suggest growth or improvement. For instance, "flourish," "thrive," and "prosper" all indicate a process of gaining strength, success, or vitality. These terms are associated with positive outcomes and an increase in well-being, making them unsuitable for describing a loss of strength. Languish, on the other hand, paints a clear picture of deterioration, making it the best choice in this context.