Traitor (noun)

1. A person who betrays their country, organization, or group by supporting an enemy or passing secret information to them.
2. A person who betrays a trust or duty.
3. A person who is disloyal or unfaithful to a cause or principle.

Origin:

The word traitor comes from the latin word "traditor" which means a person who hands over or betrays someone or something.

Examples:

1. He was executed as a traitor to the country.
2. She was accused of being a traitor to the company.
3. He was considered a traitor by his former comrades.
4. He was found guilty of high treason, a crime that is considered a betrayal of one's country.
5. He was labeled a traitor for his actions during the war.