adj.无理由的，无根据的

His accusations against her were completely groundless.
他对她的指责完全没有根据。
The rumors about the company's bankruptcy are utterly groundless.
关于公司破产的谣言完全无稽之谈。
Her fear of spiders is groundless, as they pose no real danger to humans.
她对蜘蛛的恐惧是没有根据的，因为它们对人类并无真正威胁。
Despite their groundless complaints, the project proceeded as planned.
尽管他们毫无根据地抱怨，项目还是按计划进行。
The claim that vaccines cause autism has been scientifically proven to be groundless.
疫苗导致自闭症的说法已被科学证明是无根据的。
The lawsuit against the journalist was groundless and an attempt to silence him.
对该记者的诉讼毫无根据，试图压制他的言论。
The allegations of corruption in the city council were found to be entirely groundless.
对市政会腐败的指控被发现是完全没有根据的。
Her distrust of technology seems groundless, given its numerous benefits in our daily lives.
考虑到科技在我们日常生活中的诸多益处，她对科技的不信任显得毫无根据。
The groundless assumption that all politicians are dishonest fuels public cynicism.
认为所有政客都不诚实的无端假设加剧了公众的愤世嫉俗。
The groundless fear of immigrants is often based on stereotypes rather than facts.
对移民的无端恐惧通常基于刻板印象而非事实。