But Catherine did not know her own advantages—did not know that a good-looking girl, with an affectionate heart and a very ignorant mind, cannot fail of attracting a clever young man, unless circumstances are particularly untoward.
Impatient to get rid of those hateful evidences of her folly, those detestable papers then scattered over the bed, she rose directly, and folding them up as nearly as possible in the same shape as before, returned them to the same spot within the cabinet, with a very hearty wish that no untoward accident might ever bring them forward again, to disgrace her even with herself.
There are no more uses of "untoward" in the book.
Show samples from other sources
For I should say that I know from experience that the bearing of those in extreme circumstances can sometimes be untoward and even shocking, and we must try our best to understand what is actual and essential to a person, and what is by any indication anomalous, a momentary lapse that is better forgotten than considered time and time again, to little avail.
Chang-rae Lee -- A Gesture Life
Thereafter, the whistle alone will deal with trespassing or any other untoward behaviour.