好词典
unfounded
UK //ʌnˈfaʊndɪd//US //ʌnˈfaʊndɪd//
词源
源自中古英语，由否定前缀 un- + founded（建立）构成，字面意思为'没有建立基础的'。
adjective
❶ 指言论、指控或担忧等缺乏事实或证据支持，没有根据的。常用于描述未经证实的猜测或谣言。
“The rumors about his resignation are completely unfounded.”
（关于他辞职的传言完全没有根据。）
“Her fears of being fired proved unfounded.”
（她担心被解雇的恐惧后来证明是毫无根据的。）
同义词:baseless, groundless, unsubstantiated
常见短语
unfounded rumors — 指那些没有任何事实依据、凭空捏造的谣言，常带有负面传播效果。
“The celebrity sued the magazine for spreading unfounded rumors.”
（这位名人起诉杂志散布毫无根据的谣言。）
unfounded fear — 形容因缺乏真实危险而产生的非理性恐惧，多用于心理或社会现象描述。
“Parents often have unfounded fears about their children's safety at school.”
（家长常常对孩子在校安全有无谓的担忧。）