The antonyms for "un-deterred" are words that convey the opposite meaning, such as discouraged, deterred, demotivated, or disheartened. These words suggest that there is a sense of apprehension, hesitation, or reluctance that prevents a person from pursuing something with complete confidence and enthusiasm. Being deterred can come from various sources, such as a lack of support, criticism, or setbacks. Therefore, finding appropriate antonyms for "un-deterred" can help to communicate a different tone and message, one that implies resilience, determination, and perseverance. Some alternative words that could convey this sense of resilience could be determined, motivated, inspired, or driven.