Disengagement (noun)

1. The act of breaking off an engagement or connection.
2. The act of withdrawing from involvement in a situation.
3. The act of reducing involvement or commitment to something.
4. A lack of interest or involvement in a situation or activity.

Origin:

The word "disengagement" comes from the prefix "dis-" meaning "away from" and the noun "engagement" meaning "the act of being engaged" or "an agreement to do something." it first came into use in the early 19th century and originally referred to the act of breaking off an engagement to be married.

Examples:

1. The disengagement of the two countries from the war led to a peace treaty.
2. The employee's disengagement from the project was due to lack of interest.
3. The company announced a disengagement from the controversial practice.
4. The couple's disengagement from each other was evident in their lack of communication.
5. The disengagement of the student from class was a concern for the teacher.