undisclosed
adj. C1 Advanced US //ˌəndɪˈskɫoʊzd// UK //ʌndɪsklˈəʊzd// undis·closed
adj. kept secret or not told to the public. You use this when information is hidden for privacy or legal reasons.
adj. not revealed or made known publicly. Often used in legal or financial contexts to describe sums of money or locations that must remain private.
The company was sold for an undisclosed amount of money.
The celebrity couple was married at an undisclosed location to avoid the attention of the paparazzi.
While the settlement was reached out of court, the specific terms remain undisclosed due to a strict confidentiality agreement signed by both parties.
From un- + disclosed.
Usage
Typically used attributively before a noun like 'sum', 'amount', 'location', or 'reason'.