Which of the following is the synonym of the term "HACKNEYED"?

Hackneyed refers to something overused, worn out, or lacking originality.

Let's analyse the options.

Option A, Important: It is opposite in meaning, hackneyed does not mean important

Option B, Horrible: Hackneyed is not about being horrible, but about being dull or overused.

Option C, Clichéd: “Clichéd” means trite, unoriginal, or used too often-exactly the same as hackneyed.

Option D, Heightened: Heightened means increased or intensified, not related to “hackneyed.”

So, option C is the correct answer.