unaccountably
adverb
un·ac·count·ably ˌən-ə-ˈkau̇n-tə-blē 
1
: in an unaccountable manner
looking unaccountably upset
heat was unaccountably disappearing
2
: for reasons that are hard to understand
unaccountably, he stayed right there
Example Sentences
She was looking unaccountably upset. Unaccountably, the problem was ignored.
Recent Examples on the Web No president or former president should be allowed to float unaccountably above the law. 
Maya Wiley, The New Republic, 9 June 2022 Yet unaccountably, on the brink of the future, Marlene hesitated. Tessa Hadley, The New Yorker, 21 Mar. 2022 Critics say that rail officials are seeking a blank check from state coffers, and that their timeline for completion is stretching unaccountably into the future. New York Times, 13 Mar. 2022 Some stories are about the sudden forging of close friendships, which the characters find just as unaccountable as war, but now unaccountably joyous. Sam Sacks, WSJ, 4 Mar. 2022 What should have been a recipe for disaster unaccountably yielded a masterpiece. Dallas News, 31 July 2021 Angry speculations and accusations filled the information vacuum, a vacuum that authorities also unaccountably filled with misinformation and odd demurrals of their own. Eric Zorn, chicagotribune.com, 29 Apr. 2021 This points to one of the similarities between COVID-19 and the proliferation of guns: In the face of both threats, some Americans are unaccountably averse to health measures that would provide them a measure of protection. Editorial Board Star Tribune, Star Tribune, 20 Dec. 2020 At a talent show in Hibbing High’s unaccountably ornate auditorium, the principal yanked the curtain shut on the Golden Chords and their cover of a Little Richard tune. David Remnick, The New Yorker, 9 May 2020 See More
Maya Wiley, The New Republic, 9 June 2022 Yet unaccountably, on the brink of the future, Marlene hesitated. Tessa Hadley, The New Yorker, 21 Mar. 2022 Critics say that rail officials are seeking a blank check from state coffers, and that their timeline for completion is stretching unaccountably into the future. New York Times, 13 Mar. 2022 Some stories are about the sudden forging of close friendships, which the characters find just as unaccountable as war, but now unaccountably joyous. Sam Sacks, WSJ, 4 Mar. 2022 What should have been a recipe for disaster unaccountably yielded a masterpiece. Dallas News, 31 July 2021 Angry speculations and accusations filled the information vacuum, a vacuum that authorities also unaccountably filled with misinformation and odd demurrals of their own. Eric Zorn, chicagotribune.com, 29 Apr. 2021 This points to one of the similarities between COVID-19 and the proliferation of guns: In the face of both threats, some Americans are unaccountably averse to health measures that would provide them a measure of protection. Editorial Board Star Tribune, Star Tribune, 20 Dec. 2020 At a talent show in Hibbing High’s unaccountably ornate auditorium, the principal yanked the curtain shut on the Golden Chords and their cover of a Little Richard tune. David Remnick, The New Yorker, 9 May 2020 See More Word History
First Known Use
1687, in the meaning defined at sense 1