Morphology is a part of linguistics that studies the structure of words.

He is the true ruler of this country.

He is a ruling presence in the class.

This country has a gerontocracy political system.

He is recognized as the head of state of that country.

Singapore is a prosperous city state.

He was terrified of living in a police state.

He is working as a member of the gendarmerie.

Japan is a constitutional state, and all people are equal under the law.

He has a strong belief in nationalism.