The word "over-joy" is an intense feeling of happiness or delight. However, there are several antonyms for this word that describe the opposite feeling. These can include sadness, grief, sorrow, disappointment, misery, and despair. When someone is experiencing sorrow or grief, they may feel the opposite of over-joy. This can come from a variety of reasons, such as a loss of a loved one, a failure, or a difficult situation. While it is natural to feel happiness at times, it is important to acknowledge and cope with negative emotions as they arise.