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.

His absolute belief gave him the power to overcome difficulties.

This restaurant is very hygienic.

This problem can be solved with a recursive approach.

He goes to the gym regularly.