Your report last week was unfair. It was based upon wholly unfounded and totally unjustified allegations.

你上周的报告是不公正的，它基于毫无事实根据和完全无正当理由的指控。

《柯林斯英汉双解大词典》

A: Regarding your first question, I would like to point out that the report by the Japanese media is totally unfounded.

答：关于第一个问题，我要指出的是，日本媒体的有关报道完全不符合事实。

youdao

In a 1992 report on ritual crime, FBI agent Kenneth Lanning concluded that the rampant rumors of ritual murders, cannibalism, and kidnapping were unfounded.

在1992年的一份有关宗教仪式犯罪的报告中，联邦调查局特工肯尼斯·兰宁作出结论：有关仪式谋杀者、同类相食以及绑架的肆虐的传闻未得到证实。

youdao

Shaw has seen all sorts of rumors, ranging from the serious such as company acquisitions and employee dismissals to the silly, including an unfounded report that Shaw had undergone a hair transplantation.

FORBES: How Rumors Could Actually Strengthen Your Company Culture

"The lack of such information centrally will inevitably encourage rumours, media speculation and suspicion, which may well be totally unfounded, " the report stated.

BBC: Ballots being counted in Avon and Somerset

The report was unfounded, an official said, but interesting.

ECONOMIST: Israel