Unpleasantly

I was unpleasantly surprised to find that Tom was, in fact, a raving lunatic.

During the next few decades, the changing climate is likely to harm livestock, increase the number of unpleasantly hot days, and increase the risk of heat stroke and other heat-related illnesses.

The sinister face of Dr. Bauerstein recurred to me unpleasantly. A vague suspicion of everyone and everything filled my mind. Just for a moment I had a premonition of approaching evil.