The phrase "shot ahead of" is often used to describe something or someone moving quickly past others or gaining a lead. Its antonyms would be the opposite of this movement or action. Some options could include "fell behind," "lagged," "trailing," or "lost ground." Alternatively, one could use a phrase to describe a lack of movement or action, such as "stalled," "stationary," or "motionless." Depending on the context, other antonyms could be more appropriate, such as "retreated," "moved to the back," or "let the others pass." Using antonyms can help provide richer language, varied sentence structure, and clearer communication.