Antonyms for the phrase "be apprehensive of" include expressions such as "be optimistic about," "be confident in," and "be assured of." These terms convey a sense of positivity and trust, which help to counteract feelings of unease or uncertainty. Instead of dwelling on potential negative outcomes, individuals who adopt these antonyms can focus on the possibilities and opportunities that lay ahead. By doing so, they can foster a more constructive outlook on life, and feel more motivated to pursue their goals and aspirations. Ultimately, choosing the right antonym for "be apprehensive of" can help individuals to overcome their fears and achieve success.