To mingle and blend, so that different elements can not be distinguished; to confuse.
- 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.