What is the prefix for sonic?

There isn't a specific prefix for "sonic" in the same way that you might have a prefix for "super" or "ultra." However, the word "sonic" itself is derived from the Latin word "sonus," meaning "sound."

So, while there's no established prefix, you could potentially use prefixes related to sound, such as:

* Audio- (relating to sound)

* Phono- (relating to sound)

* Sono- (relating to sound)

For example, you could use "audiosonic" or "phonosonic" to create new words, though these are not widely recognized terms.