unnameable, abominable, impossible, untellable, unspeakable, unexpressible, dreadful, inexpressible, unutterable, awful, atrocious, unpronounceable, incommunicable, undefinable, undescribable, indefinable, defying description, words, painful, terrible, incredible, ineffable
- The scene was one of indescribable confusion, although there appeared to be no fright or terror in the minds of the men who were leaving the field. - "The Rhode Island Artillery at the First Battle of Bull Run", J. Albert Monroe.
- An indescribable sadness passed over his face. - "Cord and Creese", James de Mille.
- This was the signal for a scene indescribable. - "The Red Cockade", Stanley J. Weyman.