Repented adverbs are provided in this article. The words listed here are commonly found along with the verb repented in sentences. This reference page helps answer the question what are some adverbs that describe or modify the verb REPENTED.
bitterly, deeply
heartily, immediately
publicly, quickly
really, sincerely
sorely, truly
Hope this word list had the repented adverb you were looking for. In addition to adverbs used with repented, other example verb adverb pairings can be found on this site.
You can help by adding more adverbs in the comments. Thanks.