What does the term "hackneyed" refer to in its adjective form?

The term "hackneyed," when used as an adjective, specifically refers to something that has become unoriginal or stale due to overuse. It describes expressions, ideas, or concepts that have been repeated so frequently that they no longer hold the interest or impact they once did. In this context, the adjective conveys the sense of a lack of freshness or originality, indicating that the item in question is tired or clichéd.

In contrast, the other options suggest meanings that do not align with the definition of "hackneyed." For example, describing something as "unique and innovative" contradicts the notion of being overused or lacking originality. Similarly, "rarely encountered" implies something that is uncommon rather than something that has lost its originality through excessive use. Lastly, characterizing something as "intricate and complex" does not capture the essence of repetitiveness and lack of freshness that "hackneyed" implies. Thus, the choice that accurately describes the meaning of "hackneyed" is the one that highlights its lack of originality due to frequent usage.