Swung adverbs are provided in this article. The words listed here are commonly found along with the verb swung in sentences. This reference page helps answer the question what are some adverbs that describe or modify the verb SWUNG.
abruptly, completely, easily, finally, freely
gently, gracefully, gradually, heavily, idly
immediately, lazily, lightly, loosely, noiselessly
quickly, rapidly, sharply, silently, slightly
slowly, smoothly, steadily, suddenly, violently
wildly
Hope this word list had the swung adverb you were looking for. In addition to adverbs used with swung, other example verb adverb pairings can be found on this site.
You can help by adding more adverbs in the comments. Thanks.