To mingle and blend, so that different elements can not be distinguished; to confuse.
To mistake for another; to identify falsely.
To throw into confusion or disorder; to perplex; to strike with amazement; to dismay.
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"
mistake one thing for another; "you are confusing me with the other candidate"; "I mistook her for the secretary"