Intervention (noun)

1. The act of intervening, especially in a political or diplomatic context, to change the outcome of a situation.
2. The act of participating or intervening in an ongoing situation or process.
3. The act of offering help or support in a difficult or crisis situation.

Origin:

The word 'intervention' originated in the late 17th century from the latin word 'interventio' meaning 'interference.'.

Examples:

1. The intervention of the international community was crucial in resolving the conflict.
2. The intervention of the medical team saved the patient's life.
3. The intervention of the government was necessary to prevent the spread of the disease.
4. The intervention of the mediator helped to resolve the dispute between the two parties.
5. The intervention of the mentor was instrumental in the development of the young artist.