Hollyhock
noun
The kanji and the word are exactly the same. That means they share meanings as well.
あおい
This has the same reading as the kanji you learned, meaning you know the reading!
徳川氏の家紋といえば、「三つ葉葵」が一番有名だ。
Speaking of the Tokugawa family crest, the "three hollyhock leaves" is the most famous.