The phrase "being back of" implies a sense of lagging behind or being inferior to something or someone. Its antonyms include "leading," "ahead of," "in front of," and "superior." When someone is leading, they are considered to be the top or pinnacle of their field or area of expertise. Being ahead of someone or something means one has progressed further or is more advanced. In front of implies a sense of urgency, while superior denotes dominance over others. Using the antonyms allows us to communicate a more precise meaning, which is essential when communicating ideas or intentions clearly.