confused - with - about - by 

1. She was confusedthe foreign idiom. 
2. I always confused MikeTom. They are twins. 
3. He is confusedwhat is going on after he leaves home. 
4. He suddenly appeared to make everyone
5. This problem isto all of them.

logic - worried - disordered - garbled - misunderstanding - obscure - disoriented - pessimistic - negative - jumbled