General Antonyms:
* Reluctantly
* Hesitantly
* Unwillingly
* Indifferently
* Apathetically
Specific Antonyms Depending on Context:
* Lazily: If "eagerly" implies enthusiasm and energy.
* Slowly: If "eagerly" implies quickness or impatience.
* Disdainfully: If "eagerly" implies anticipation or desire.
* Grudgingly: If "eagerly" implies willingness or enthusiasm.
For example:
* Eagerly: He eagerly awaited the arrival of his friends.
* Reluctantly: She reluctantly agreed to help with the project.
The best antonym for "eagerly" will depend on the specific situation and the intended meaning.