unaccountably

adverb

No English definition recorded for this entry.

L201896 on Wikidata ↗

Wiktionary

adv

Etymology: Etymology tree English unaccountable Middle English -ly English -ly English unaccountably From unaccountable + -ly.

Not able to be explained logically. Without being accountable, or reasonable.
“After all that hard work, he unaccountably failed to take out the patent.”
“The jury was unaccountably slow to reach a verdict. He was clearly innocent.”