The antonyms for the word "un-bound" are many and varied, depending on the context in which the word is used. For example, the antonyms for "un-bound" in the sense of being free or unrestricted include "bound," "restricted," "tied," "restrained," "confined," or "limited." In contrast, the antonyms for "un-bound" in the sense of being released or untied include "bound," "tied," "fastened," "secured," or "fixed." Similarly, the antonyms for "un-bound" in the sense of being unattached include "bound," "connected," "joined," "attached," or "fixed." Therefore, identifying the right antonym for "un-bound" depends on its intended meaning in the given sentence or context.