Which of the following words indicates something that continues without interruption?

The term "unremitting" signifies something that is constant and continues without any interruption. It conveys the idea of persistence and endurance, indicating that whatever is being described is ongoing and does not pause or cease. This is why "unremitting" is the correct choice for indicating continuity without interruption.

Other options, such as "transient," refer to things that are temporary and not lasting, suggesting a brief or fleeting nature. "Intermittent" describes something that occurs at irregular intervals, implying breaks or pauses in occurrence. "Occasional" refers to something that happens infrequently or irregularly, again suggesting a lack of continuity. In contrast, "unremitting" emphasizes a steady, unbroken flow, making it the most suitable word for the given context.