Chikashi is my best friend.

They are unfriendly brothers.

They are rumored to be in an unfriendly relationship.

There are a lot of scale insects on this tree.

He fought desperately to protect himself.

He threw the ball with all his might.

This area is still undeveloped and rich in nature.

This area is still undeveloped, and nature is abundant.

He set the bird free.

In the old days, people excreted naturally.