The term "be apprehensive" refers to a feeling of anxiety or fear about something that may happen. Antonyms for this concept include "be confident," which suggests a state of trust in oneself and one's abilities, and "be relaxed," which implies a feeling of calmness and ease. "Be optimistic" is another antonym, indicating a positive outlook and trust in the future. Other antonyms may include "be carefree," meaning without worry, or "be fearless," meaning without fear. Ultimately, there are many different ways to express the opposite of being apprehensive, which can vary based on the context, situation, and personal perspective.