* Warmly: This suggests a more positive and enthusiastic attitude.
* Eagerly: This implies a strong desire or willingness to do something.
* Gladly: This indicates pleasure and willingness.
* Cheerfully: This expresses a positive and happy demeanor.
* Enthusiastically: This shows a strong and positive feeling.
* Willingly: This implies a lack of reluctance and a readiness to do something.
* Readily: This suggests a quick and willing response.
* With pleasure: This emphasizes the enjoyment of doing something.
* Without hesitation: This suggests a lack of doubt or reluctance.
The best antonym will depend on the specific nuance you want to convey.