He had a self-satisfied smile on his face.

He is always seeking the spotlight for self-display.

His music is created in a world of self-satisfaction.

He has a self-centered personality and doesn't listen to others' opinions at all.

By conducting self-analysis, you can understand your own strengths and weaknesses.

It's difficult to do self-advertisement in an interview.

I get nervous when I self-advertise during interviews.

In statistics, the concept of autocorrelation is very important.

He is learning karate for self-defence.

Multicellular organisms, unlike unicellular organisms, have specialized cells in their bodies that perform functions.