concealed
v. B2 Upper Intermediate US //kənˈsiɫd// UK //kənsˈiːld// con·cealed
v. kept hidden or out of sight so that other people cannot see it.
v. kept secret or hidden from sight. Often used to describe objects or intentions that are intentionally obscured from public view.
The spy carried a concealed weapon.
The entrance to the safe was concealed behind a large oil painting in the library.
The author uses a series of metaphors to keep the protagonist's true motivations concealed until the final chapter of the novel.
Usage
Typically placed before the noun it modifies; often functions as a participial adjective.