Definition of "untellable" [untellable]

• That cannot be told; indefinable, indescribable or ineffable. (adjective)

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• "And this was to say nothing of my one diarist's duty still undischarged: If I was snuffed out here and now who would tell the untellable tale?"
• "That is the first step in telling our most important untellable truths."
• "Here are just a few examples of presently untellable truths:"