confound

(v) be confusing or perplexing to; cause to be unable to think clearly
- These questions confuse even the experts
- This question completely threw me
- This question befuddled even the teacher
befuddle, bedevil, confuse, discombobulate, fox, fuddle, throw,
(v) mistake one thing for another
- you are confusing me with the other candidate
- I mistook her for the secretary
confuse,

befuddle bedevil confuse discombobulate fox fuddle throw

confounded confoundedly confounding