ADJ
未經證實的；無根據的；不確鑿的
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.
我強烈反對他們的說法，那是毫無根據的。
...unsubstantiated rumours about his private life.
有關他私生活的捕風捉影的謠言