unadmitted
adjective
un·ad·mit·ted ˌən-əd-ˈmi-təd 
-ad-
: not admitted
especially : not acknowledged or confessed
an unadmitted desire/wish
the unadmitted reason for their behavior
Example Sentences
Recent Examples on the Web Sophisticated state failure is an unadmitted father of the Western world’s drift to populist politics. 
WSJ, 4 Jan. 2022
WSJ, 4 Jan. 2022 Word History
First Known Use
1895, in the meaning defined above