To cause to become confused or perplexed. See Synonyms at puzzle.
To fail to distinguish; mix up: confound fiction and fact.
To make (something bad) worse: Do not confound the problem by losing your temper.
To cause to be ashamed; abash: an invention that confounded the skeptics.
To damn.
To frustrate: trivial demands that confounded the peace talks.
Archaic To bring to ruination.
[Middle English confounden, from Anglo-Norman confundre, from Latin cōnfundere, to mix together, confuse : com-, com- + fundere, to pour; see gheu- in Indo-European roots.] con·found'er n., con·found'ing·ly adv.