or

Good teacher. Also pronounced kusushi.

Probably kusushi in general. When writing an article, write about a doctor or a chemist.

There is a saying in ancient literature called "grass in vain"

よききつぁ. I am a friend. 2. Dr つに (くすし). Three friends who know each other.

Translation; There are three kinds of good friends, one is to give things, the other is to be a doctor, and the third is to be wise.