
(常用义)不充实的;内容空泛的;缺乏实质的。可形容论点、证据、信息、承诺等“不够有分量”。(也可指“轻的、不结实的”,但较少见)
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The report was unsubstantial and full of vague claims.
这份报告内容空泛,充满了含糊其辞的说法。
Although the speech sounded confident, its arguments were unsubstantial and failed to convince the audience.
尽管演讲听起来很有自信,但论证缺乏实质,没能说服听众。
由 **un-**(否定前缀,“不、非”)+ substantial(“实质的、重要的”,源自拉丁语 substantia,意为“实体、本质”)构成,字面意思就是“没有实质的”。