His indomitable spirit never breaks, even in difficult situations.

The mood of this restaurant is very calm, and you can relax.

He pocketed the company's funds for his personal gain.

In this chemical reaction, the catalyst promotes activation.

He chose tiles to make the roof of the house.

This ancient document contains the word 'father sound', which is no longer used in modern Japanese.

In this old document, the archaic word '用ゐる' is used.

This application is very convenient.

You can apply this theory to actual problems.

This app has high practical use.