too sacred to be uttered;
"the ineffable name of the Deity"
defying expression or description;
"a thing of untellable splendor"
very difficult to pronounce correctly;
"an unpronounceable foreign word"
"unutterable consonant clusters"
- He has already gone through unutterable agonies.
- He was silent, and I guessed at his unutterable depression.
You are an unutterable nuisance, but I suppose you must have your own way.出自： R. Sutcliff
He clasped Frank's hand with a look of unutterable sympathy.出自： E. Longford