Synonyms of 'indescribable'
unutterableDictionary, indefinable, beyond words
The stench from the sewer is indescribable.
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incapable of being communicated
An indefinable quality or feeling cannot easily be described.
There was something indefinable in her eyes.
Thesaurus for indescribable from the Collins English Thesaurus
You use indescribable to emphasize that a quality or condition is very intense or extreme, and therefore cannot be properly described .