Relax adverbs are provided in this article. The words listed here are commonly found along with the verb relax in sentences. This reference page helps answer the question what are some adverbs that describe or modify the verb RELAX.
actually, completely, consciously
finally, fully, gradually
really, simply, slightly
slowly, suddenly, totally
truly, visibly
Hope this word list had the relax adverb you were looking for. In addition to adverbs used with relax, other example verb adverb pairings can be found on this site.
Maximally
Quietly?