This is the 7473rd most frequent Japanese word.
優美
Graceful; elegant.
In this sentence, "優美" (yuubi) is used as an adjective describing the elegance of the dance.
彼女の優美な舞踊は、観客を魅了しました。
Her graceful dance captivated the audience.
Here, "優美" (yuubi) conveys the aesthetic beauty and elegance of the natural environment.
この公園は自然の優美さを完璧に表現しています。
This park perfectly represents the elegance of nature.
In this context, "優美" (yuubi) is used to describe the refined and elegant quality of the words used in the poetry.