Confuse (verb)

1. Fail to distinguish one thing from another.
2. Cause (someone) to become bewildered.
3. Puzzle or perplex.

Origin:

Late middle english: from latin confus- "mixed together", from the verb confundere, from con- "together" + fundere "pour".

Examples:

1. He was confused by the instructions.
2. She was confused by the question.
3. The company's new policy confused its employees.
4. The new information confused her understanding of the situation.
5. The lecture confused the students.