Prospering
Prosperity
noun, verbal noun
If you're overgrown with prosperity you are probably really prospering.
This is a jukugo word that uses the on'yomi readings of the kanji. You should be able to read this on your own.
信じられないかもしれませんが、私が生まれ育ったこの港町は、かつては繁栄していたんですよ。
You might not believe it but this port town where I was born and raised was once prosperous.