Which word could describe a turbulent relationship?

The word "tempestuous" accurately describes a turbulent relationship because it conveys a sense of volatility, chaos, and intense emotions—similar to a storm or tempest. In the context of relationships, this term suggests that the dynamics between the individuals can be marked by conflict, passion, and unpredictability, indicating a lack of peace and stability.

On the other hand, "harmonious," "stable," and "content" signify positive or calm conditions, which is the opposite of what "turbulent" implies. These words suggest peaceful, stable, and satisfactory situations rather than the tumultuous environments that "tempestuous" captures. Thus, "tempestuous" stands out as the suitable choice for describing a relationship characterized by turbulence.