ADJ (恐惧、指控、报道等)无理由的,无根据的 If you say that a fear, accusation, or story is groundless, you mean that it is not based on evidence and is unlikely to be true or valid.
Fears that the world was about to run out of fuel proved groundless... 事实证明对于世界燃料即将耗尽的担忧毫无根据。
A ministry official described the report as groundless. 一位部级官员称这篇报道纯属子虚乌有。