Which word best describes a temporary state or condition?

The word "interim" is best suited to describe a temporary state or condition. It specifically refers to a role or situation that is meant to last for only a limited period, often while waiting for something more permanent to take its place. For instance, an interim manager may be appointed to fill a vacancy until a long-term replacement is found. This accurately captures the nature of something that is not meant to be lasting but serves a purpose for the time being.

In contrast, "perpetual" refers to something that is everlasting or never-ending, which contradicts the idea of a temporary state. "Provisional," while also implying temporary, often suggests a more formal arrangement, such as provisional licenses or approvals, but it doesn't specifically denote an interim role. "Chronic" speaks to conditions that are long-lasting or recurring, again not aligning with the notion of temporariness. Therefore, "interim" is the most appropriate choice to denote a situation that is not permanent.