Difference between agreement and opposition in Korean
동의·반대

동의agreement
동의 means agreement or saying that you agree with something. You use it when you think an idea, plan, or choice is okay. In daily conversation, people often say 동의해요 to mean “I agree.”

반대opposition
"반대" means opposition, or being against something. You use it when you do not agree with an idea, plan, or action. It is common in everyday sentences like saying you oppose a rule, a choice, or a trip.
The difference
반대 means you do not agree. It is the opposite of saying an idea or plan is okay.