I knew him, and you now find that my suspicion was not groundless.

我认识他，你现在发现我的怀疑不是没有根据的。

youdao

And their fears are not groundless: More than 90% of proprietary cryptography has been broken.

他们的害怕并非没有根据：90%以上的专用密码术都已被攻破。

youdao

This optimistic prediction is not groundless.

这个乐观的预言，不是没有根据的。

youdao

Such fears are not entirely groundless if the recent conduct of some of Congo's neighbours is anything to go by.

ECONOMIST: A ravenous dragon | The

Hopefully such groundless sensationalism will not derail a regulation so clearly in the public interest.

FORBES: The Death Panel Boogeyman

Did the band want to preserve the mystique of this much-hyped performance to ensure a hungry and willing audience if there ever was a true reunion tour (probably a groundless concern with those 20 million lottery participants not going anywhere)?

FORBES: Led Zeppelin's 'Celebration Week', Part II (But No More Ramblin' On?)