Appendix
noun, の adjective
Which of your guts is blind? Your appendix. That's why so many people have to get them out. It's in there blind, bumping around, messing things up.
This is a jukugo word that uses the on'yomi readings of the kanji. You should be able to read this on your own.
手術で盲腸を取ってしまいました。
My appendix had to be surgically removed.