self-effacing, humble oneself, condescend, be modest

彼は謙虚な性格で、自分の成功を自慢しません。

He is a humble person who does not boast about his success.

謙譲語を使って相手に敬意を示す。

I show respect to the other person by using humble language.

先生は常に謙虚な態度を保っている。

The teacher always maintains a humble attitude.