A more thorough explanation:

Definition: Jus precarium is a Latin term used in civil law to refer to a right to something that is held for another person. This right cannot be enforced through legal action, but only through entreaty or request.

An example of jus precarium is when a person allows someone else to use their property without any formal agreement or contract. The person using the property has a right to use it, but this right is not legally enforceable. If the owner of the property decides to revoke this right, the person using the property has no legal recourse.

Another example of jus precarium is when a person lends their car to a friend. The friend has the right to use the car, but this right is not legally enforceable. If the owner of the car decides to revoke this right, the friend has no legal recourse.

These examples illustrate the concept of jus precarium because in both cases, the person holding the right to use the property or car does not have any legal protection. They can only rely on the goodwill of the owner to continue using the property or car.