Which word represents the act of forcing someone to act in a particular way through pressure or threats?

The word that accurately describes the act of forcing someone to act in a particular way through pressure or threats is "coerce." Coercion involves compelling an individual to do something against their will or better judgment by using intimidation, manipulation, or direct threats. This term highlights the element of pressure involved in the action, distinguishing it from more benign influences.

In contrast, "coax" refers to persuading someone gently and often involves encouragement rather than pressure, making it unsuitable for describing forceful actions. "Catalyst" denotes something that causes a change or brings about an event, particularly in a chemical context, rather than implying any form of force or pressure. Lastly, "clamor" indicates a loud and persistent outcry or demand, focusing on the vocal aspect of making a request rather than any element of coercion or forceful persuasion. Thus, "coerce" is the most precise term for the situation described in the question.