unfounded
adjective uk/ʌnˈfaʊn.dɪd/ us/ʌnˈfaʊn.dɪd/
（断言或消息）捕风捉影的，无根据的
If a claim or piece of news is unfounded, it is not based on fact.
Our fears about the weather proved totally unfounded. 我们对天气的担忧毫无根据。
Synonyms: baseless groundlessunwarranted