The term "blow the lid off" is often associated with revealing or exposing secrets or scandals. However, there are many antonyms for this phrase that can indicate keeping things hidden or maintaining privacy. Some of these antonyms include "conceal," "suppress," "cover up," "cloak," "veil," and "shield." These words imply intentional efforts to keep certain information or actions out of the public eye. While there may be situations where such measures are necessary, it is important to weigh the costs and benefits of hiding things away versus being transparent and honest. Ultimately, the decision of whether to "blow the lid off" or not depends on the context and the potential consequences of exposing the truth.