Covenant (noun)

1. A binding agreement or promise to do or not do something.
2. A formal agreement or contract, especially one made by a ruler or government.
3. A religious agreement or promise to follow certain rules and customs.

Origin:

The word covenant comes from the latin word "convenire" which means "to come together" and it first appeared in the english language in the 14th century.

Examples:

1. The couple made a covenant to love and honor each other for the rest of their lives.
2. The employees entered into a covenant with the company to work for a certain period of time.
3. The two nations agreed to a covenant of non-aggression.
4. The church members made a covenant to follow the Ten Commandments.
5. The covenant between the landlord and tenant required the tenant to pay rent on time.