Meaning : 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.
bedevil, befuddle, confuse, discombobulate, fox, fuddle, throw
Meaning : Mistake one thing for another.
You are confusing me with the other candidate.
I mistook her for the secretary.