General antonyms:
* Amplify: To make something louder or more intense.
* Enhance: To improve or increase the quality of something.
* Clarify: To make something easier to understand.
* Strengthen: To make something stronger or more powerful.
Antonyms related to sound:
* Amplify: To make a sound louder.
* Project: To make a sound carry further.
* Articulate: To speak clearly and distinctly.
* Clarify: To make a sound more distinct and understandable.
Antonyms related to expression:
* Articulate: To express oneself clearly and effectively.
* Unleash: To release something without restraint.
* Express: To communicate thoughts or feelings openly.
Antonyms related to covering or hiding:
* Reveal: To make something visible or known.
* Uncover: To remove something that is covering or hiding something else.
* Expose: To make something open or vulnerable.
The best antonym for "muffle" will depend on the specific context of the sentence.