unutterably

adv

1. In an unutterable manner; inexpressibly; so bad or otherwise extreme that one cannot talk about it.

   “We both of us went on our knees, and, feeling unutterably sad, a whispered prayer went up from our lips as the poor fellow's soul flitted away to a happier and brighter world, and all was over.”

   “I turned away and left her to finish her journey in peace, feeling, but only for a moment or two, that I had been an unutterably mean hound.”

   “The rapid reconquest of the capital, Kabul, by the Taliban after two decades of a staggeringly expensive, bloody effort to establish a secular government with functioning security forces in Afghanistan is, above all, unutterably tragic.”