Distended adverbs are provided in this article. The words listed here are commonly found along with the verb distended in sentences. This reference page helps answer the question what are some adverbs that describe or modify the verb DISTENDED.
belly, enormously
fully, greatly
slightly, widely
Hope this word list had the distended adverb you were looking for. In addition to adverbs used with distended, other example verb adverb pairings can be found on this site.
You can help by adding more adverbs in the comments. Thanks.