Noun and の adjective
しょくよく
ダイエットをしたいんですが、食欲があり過ぎるんですよね。
I want to go on a diet, but I have too much of an appetite.
I have a food want. When I want food (or when I don't want food), it has to do with your appetite.
This is a jukugo word that uses the on'yomi readings of the kanji. You should be able to read this on your own.