answerless

From answer +‎ -less.

answerless (not comparable)

1. Having or producing no answer.
2. Not capable of being answered; unanswerable.

• William Dwight Whitney, Benjamin E[li] Smith, editors (1911), “answerless”, in The Century Dictionary […], New York, N.Y.: The Century Co., →OCLC.
• “answerless”, in Webster’s Revised Unabridged Dictionary, Springfield, Mass.: G. & C. Merriam, 1913, →OCLC.