1. 形容詞
   無根據的, 沒有根據的
   無基礎的, 沒有基礎的
   無緣無故的
   

   同義字詞
   foundationless,groundless,invalid,nonvalid,unfounded,unreasonable,unsubstantiated,unsupported,unwarranted
   

例句

1. You KNOW that your slander was baseless .
2. Totally baseless but I keep thinking : "Why?
3. This complaint is baseless and without merit .
4. Not only mean; perhaps it was utterly baseless .
5. It's a baseless lie, like your entire existence.
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