Advisor
noun
The people who will review a problem are those who know more about the problems. They are the advisors.
こもん
This is a jukugo word that uses the on'yomi readings of the kanji. You should be able to read this on your own.
明日、部活を休んでもいいかどうか、顧問の先生に聞いてみたら？
Why don't you ask your advisor if it's okay for you to miss club activities tomorrow?
自分からやりたいと言ったわけではなくて、その会社の顧問をしてほしいと頼まれたんですよ。
I didn't say I wanted to do it, but I was asked to be an advisor to that company.
彼は良いバスケ部の顧問だとの評判があります。
Rumor has it, he’s a good advisor for the basketball club.