A back vowel is a vowel that is pronounced at the back of the mouth.

Beautiful Japanese andromeda is blooming in the garden.

The turaco is known for its beautiful feather color.

The comet is beautifully decorating the night sky.

He feels like a loner at school.

We will make a public appeal for ideas for the new project.

This old book is very valuable because it has been dried out.

After the flood, we dried out the books in the library.

He was playing 'tōsenbō' in the hallway.

He was blocking my way.