What is an adverb for silence?

There isn't a single perfect adverb for "silence," but here are some options depending on the context:

For a general sense of quiet:

* Quietly

* Silently

* Hush-hush (informal)

To emphasize a specific aspect of silence:

* Soundlessly (emphasizes lack of sound)

* Stealthily (suggests movement without noise)

* Secretly (implies something is being done in silence)

* Discreetly (indicates a deliberate effort to be quiet)

* Subtly (suggests a subtle and quiet presence)

To describe a negative aspect of silence:

* Grimly (suggests a silence filled with tension)

* Ominously (implies a foreboding silence)

* Eerily (evokes a sense of unsettling silence)

The best choice will depend on the specific situation and the nuance you want to convey.