Oligarchy is a political system where a few powerful people rule the country.

Proportional representation is an important system to ensure the fairness of elections.

My company has introduced a layoff system.

He is doing special exercises to strengthen his depressor muscle.

Primitive communism is one of the initial forms of human social organization.

The system of provinces was a part of the ancient political system in Japan.

He has gephyrophobia, and is afraid of crossing bridges.

He entered the room trembling with fear.

Technetium is one of the most unstable elements in the periodic table.

He injured his wrist.