Wordplay · Ages 12–15
Riddle #142
One nine-letter English word contains all five vowels — A, E, I, O, U — each exactly once and in perfect alphabetical order. It means treating a serious subject with unhelpful humour. What word is it?
You solved this one before
Answer: Facetious
F-A-C-E-T-I-O-U-S. "Abstemious" pulls off the same trick.