The phrase "was bound" implies being obliged or restricted in some way. Synonyms for this phrase include "compelled," "constrained," "obligated," "required," "committed," and "bounden." These terms suggest a sense of duty or responsibility, often to fulfill a promise or meet a standard. "Bound" can also suggest being limited or restricted, as in "I was bound by the rules." In this case, synonyms might include "restricted," "confined," "restrained," "tied," "imprisoned," or "hindered." Overall, the word "was bound" and its synonyms convey a sense of obligation or limitation.