1. 形容詞
   不能下定義的
   不確定的
   難以解釋的, 難以說明的
   

   同義字詞
   incommunicable,indescribable,ineffable,inexpressible,nameless,uncommunicable,unspeakable,unutterable
   

例句

1. They define that which is indefinable .
2. Always worrying about the indefinable moment.
3. Faith seems to be belief in the indefinable .
4. Her heart lurched with an indefinable longing.
5. That's indefinable and therefore worth hearing.
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