To perplex or puzzle.
To fail to see the difference; to mix up; to confuse right and wrong.
To make something worse.
Don't confound the situation by yelling.
To combine in a confused fashion; to mingle so as to make the parts indistinguishable.
To cause to be ashamed; to abash.
His actions confounded the skeptics.
To defeat, to frustrate, to thwart.
To damn (a mild oath).
Confound the lady!
To bring to ruination.
To stun, amaze
Confused, astonished
Defeated, thwarted
Damned, accursed, bloody
The confounded thing doesn't work.