The curious case of “The Solitary Cyclist” developed into an actual tale of crime and had a twist that I didn’t see coming. This is one of The Greatest Adventures of Sherlock Holmes. I didn’t foresee the ending, but Holmes did, and used this word to describe what he was anticipating.

Untoward – unexpected and inappropriate or inconvenient

Usage: “I think, Watson, that we must spare time to run down together on Saturday morning and make sure that this curious and inclusive investigation has no untoward ending.”