He frowned in order to solve a difficult problem.

His story is clearly a questionable one.

I think his story is questionable.

He has a very passive personality.

This cloth is made of futoori.

This kimono is made of futoginu.

This bread is very soft and delicious.

You need to install new software.

This glass is completely opaque.

The opacity of this glass helps to maintain the privacy of the room.