Quell (verb)

1. To put an end to (a rebellion or other disturbance).
2. To suppress or crush (a feeling or emotion).
3. To silence or pacify (someone).

Origin:

From middle english quellen, from old english cwellan, from proto-germanic *kwellaną, from proto-indo-european *gweld- ("to strike, kill").

Examples:

1. The police quelled the riots.
2. The army was sent in to quell the rebellion.
3. The government quelled the public protest with force.
4. She quelled her fear and went on stage.
5. He quelled the crowd with a stern warning.