The antonyms for the word "retro-ceding" are advancing, progressing, moving forward, and proceeding. These words signify a movement in the opposite direction of "retro-ceding," which means to withdraw or retreat. To advance is to make progress or move forward, while "progressing" means to make steady progress in a particular direction. "Moving forward" implies the act of making progress or advancing, while "proceeding" denotes moving forward in a particular course of action. These antonyms highlight the importance of moving forward, making progress, and not retreating in the face of challenges.