confound
Pronunciation: /kənˈfaʊnd/
verb
- 1cause surprise or confusion in (someone), especially by not according with their expectations: the inflation figure confounded economic analysts
- prove (a theory or expectation) wrong: the rise in prices confounded expectations
- defeat (a plan, aim, or hope): we will confound these tactics by the pressure groups
- archaic overthrow (an enemy): God chose to use natural disorders to confound Pharaoh and the gods of Egypt

Origin:
Middle English: from Old French confondre, from Latin confundere 'pour together, mix up'. Compare with confuse