Relaxed adverbs are provided in this article. The words listed here are commonly found along with the verb relaxed in sentences. This reference page helps answer the question what are some adverbs that describe or modify the verb RELAXED.
actually, completely, considerably, deeply
fairly, finally, fully, gradually
greatly, immediately, instantly, perfectly
quickly, really, slightly, slowly
suddenly, sufficiently, totally, utterly
visibly
Hope this word list had the relaxed adverb you were looking for. In addition to adverbs used with relaxed, other example verb adverb pairings can be found on this site.
You can help by adding more adverbs in the comments. Thanks.