nonplusment
n.—Gloss: State of confusion or befuddlement; the noun form of the verb “nonplus.” Note: Not a new word, but rare. «Perhaps unsurprisingly—apologies to the good people of 1956 Miami—the reception amid the swizzle sticks and shuffleboards was general nonplusment.» —“A Long Wait for Another Shot at Broadway” by Charles Isherwood New York Times Apr. 22, 2009. (source: Double-Tongued Dictionary)
Further reading
In 1916, a small-town newspaper in Pennsylvania printed a fanciful item about a local gathering with a guest list that included, among others, Miss Ella Vader, Mr. Ray Zor, and other punny names. This is part of a complete episode. Transcript of...
Donna in Redwood City, California, reports confusion in her workplace over the term confirming. If she gets an email that says Confirming the supplies will be delivered on Tuesday, she assumes that this means the sender is still in the process of...