groundless

a. 无根据的

Of course, these implications would sly and groundless, and the opposition would realize it. But the voters might not. They would say where there's smoke there's fire.

当然这些暗示是狡诈的，毫无根据的，反对派懂得这点。但选民不一定懂得，他们会说无风不起浪。

Facts have proved these worries groundless.

事实证明，这些忧虑是没有根据的。