puzzling

It is your commonplace, featureless crimes which are really puzzling, just as a commonplace face is the most difficult to identify.

Besides, _she’s_ she, and _I’m_ I, and—oh dear, how puzzling it all is!

“It _is_ a long tail, certainly,” said Alice, looking down with wonder at the Mouse’s tail; “but why do you call it sad?” And she kept on puzzling about it while the Mouse was speaking, so that her idea of the tale was something like this:—

Here was another puzzling question; and as Alice could not think of any good reason, and as the Caterpillar seemed to be in a _very_ unpleasant state of mind, she turned away.