The phrase "lay down arms" usually means to surrender or give up fighting. Synonyms for this phrase could include "cease hostilities," "disarm," "surrender," "submit," "yield," or "capitulate." All of these words suggest a willingness to stop conflict, whether it be through negotiation or force. Other synonyms could include "retreat," "withdraw," "relinquish," or "concede." In some cases, these words could suggest a tactical decision to give up a position or objective in order to regroup or re-strategize. Regardless of the context, the synonyms for "lay down arms" all imply a choice to end a conflict.