confound >> /kənˈfaʊnd/
Definition: [transitive verb] Cause surprise or confusion in (someone), especially by acting against their expectations.
Example: the inflation figure confounded economic analysts
Definition: [transitive verb] Mix up (something) with something else so that the individual elements become difficult to distinguish.
Example: 'nuke' is now a cooking technique, as microwave radiation is confounded with nuclear radiation
Definition: [exclamation] Used to express anger or annoyance.