He always has an optimistic attitude.

His music is very avant-garde, and some people might not understand it.

His original idea saved the company.

This word is etymologically derived from Latin.

Looking at this kanji graphically etymologically, its shape represents its meaning.

Japanese history had a feudal social structure for a long time.

He often acts selfishly.

He is leading a hedonistic lifestyle.

His arbitrary actions confused the entire team.

He chose an expedient solution.