The antonym for the phrase "being made known" is "being kept secret". While the former means that something is being revealed or disclosed, the latter indicates that it is being concealed or hidden from view. Keeping something secret can sometimes be necessary for security and privacy reasons, but it can also lead to mistrust and skepticism. In contrast, making something known can promote transparency and accountability, which are crucial for building strong relationships and fostering trust. Therefore, it is important to carefully consider whether to keep something secret or to make it known, depending on the situation and the intended outcome.