What term refers to secretly concealing actions or intentions?

The term that refers to secretly concealing actions or intentions is "covert." In the context of security and intelligence, covert operations or actions are those that are undertaken in a way that is hidden or concealed from the public or adversaries. This secrecy is often essential to the success of certain operations, allowing individuals or organizations to achieve objectives without being detected.

In contrast, other terms provided in the choices have different meanings. "Overt" and "open" indicate visibility or transparency, where actions and intentions are clear and obvious to everyone. "Obscured" suggests something that is hidden or not easily seen but does not specifically imply the intentional concealment of actions or intentions like "covert" does. Therefore, "covert" directly aligns with the concept of secretive behavior or intentions.