His eyes were filled with deep sorrow.

This math problem requires finding out what the base of the logarithm is.

What is at the bottom of this lake?

This forest is a habitat for many kinds of animals.

I often go to the sea on weekends.

Umi is my best friend.

The sea breeze feels comfortable.

He found the sea on an old map.

He found the sea on an old map.

I love swimming at the seashore.