The antonyms for the word "sending forward" vary depending on the context in which it is used. However, some possible antonyms can include "holding back," "retracting," "pulling back," "withdrawing," "stopping," "halting," "retreating," "reverse," and "backward." These antonyms suggest a movement opposite to "sending forward" and imply a sense of being stopped or held back. For instance, you might "hold back" information from an individual or "withdraw" a claim that you initially made. In summary, antonyms for "sending forward" are words that indicate a pause or reversal in motion.