For a physical action:
* Gently: This is the most straightforward option.
* Softly: Implies a delicate touch.
* Carefully: Emphasizes taking care not to hurt or damage something.
* Tenderly: Conveys warmth and affection.
For a manner or tone:
* Kindly: Implies a kind and compassionate approach.
* Mildly: Indicates a calm and restrained manner.
* Delicately: Refers to a subtle and refined approach.
* Graciously: Suggests a courteous and polite way.
For a quality of something:
* Gently: Can be used here as well.
* Softly: Describes something with a soft texture or appearance.
Ultimately, the best adverb will depend on the specific situation.