The phrase "be announced" refers to the act of declaring or making something known to the public or a specific audience. The opposite of this action would be to conceal or keep something hidden, which can be described using antonyms such as hide, suppress or withhold. Additionally, another antonym for "be announced" would be to retract or withdraw a statement, indicating the reversal of the initial declaration. Other antonyms that may be used in this context include deny, disavow, and refute, which entail the rejection or contradiction of a previously stated piece of information. Overall, understanding the antonyms of "be announced" can help provide a better understanding of the various ways communication can occur.