If you're talking about quality**:
* Well: This is the most direct opposite, meaning something is done skillfully or effectively.
* Excellently: This signifies a high level of skill or quality.
* Perfectly: This implies flawlessness and complete accuracy.
* Wonderfully: This suggests something is exceptionally good or delightful.
If you're talking about physical condition**:
* Well: This signifies good health or feeling healthy.
* Healthily: This emphasizes that something is good for one's health.
If you're talking about emotional state**:
* Happily: This indicates a positive emotional state.
* Joyfully: This implies a state of great happiness.
Examples:
* He played the piano badly. (opposite: He played the piano well/excellently/perfectly/wonderfully)
* She felt badly after eating too much. (opposite: She felt well/healthily)
* The news was received badly. (opposite: The news was received happily/joyfully)
It's important to consider the context when choosing the opposite of "badly" to ensure the meaning is clear.