1. in a confusing or bewildering manner; in a way that is difficult to understand or explain
Usage: formal or literary
2. used as an intensifier to express annoyance, frustration, or emphasis; extremely or very
Usage: informal; dated

Examples

• The instructions were confoundedly unclear, leaving everyone puzzled.
• It is confoundedly difficult to predict the weather more than a week in advance.
• The witness gave a confoundedly vague account of what happened that night.
• That is a confoundedly stubborn problem to solve.
• The plot of the film was confoundedly complex and hard to follow.
• He spoke in a confoundedly roundabout way, never getting to the point.