In Latin, how would you say "to block"?

The term that translates to "to block" in Latin is indeed "obsideo." This verb specifically denotes the action of laying siege to or obstructing, effectively conveying the idea of blocking something in both a literal and figurative sense. In various contexts, "obsideo" can be employed to describe hindering movement or stopping an action.

Understanding the meaning of "obsideo" helps in recognizing its usage in Latin literature and speech, where blocking or obstructing an enemy or a certain path would be pertinent. Other words provided, such as "obliviscor," which means "to forget," "erumpo," meaning "to break out" or "burst forth," and "nefarius," which describes something wicked or nefarious, do not relate to the concept of blocking. Each of those terms has its unique application, highlighting that "obsideo" is the most appropriate choice for expressing the idea of blocking.