undisclosed

An undisclosed secret or problem means that it hasn't been shared with anyone, often because it's personal or sensitive.

Imagine going to your doctor and they don't mention anything about a test result. You might ask them if everything is okay, and they'll say something like "It's all good" but then you notice their expression seems a bit off. Later on, the doctor comes back to tell you that there was actually some issue with your test - it was an undisclosed problem. The doctor didn't want to worry you unnecessarily until they had more information.

The word "undisclosed" can also be used as an adjective for something that is not mentioned or revealed in a plan, proposal, or report. In business, people might use the term to describe a company's financial dealings or future plans that aren't made public yet.

Note: The most common usage of the word "undisclosed" refers to secrets or problems, but its meanings can vary depending on context and situation.