ADJ
未经证实的;无根据的;不确凿的
A claim, accusation, or story that is unsubstantiated has not been proved to be valid or true.
例句
I do object to their claim, which I find totally unsubstantiated.
我强烈反对他们的说法,那是毫无根据的。
...unsubstantiated rumours about his private life.
有关他私生活的捕风捉影的谣言