to act against something in order to reduce or stop it
Medicine is supposed to counteract illnesses.
The doctor prescribed medication to counteract the allergic reaction and alleviate the patient's symptoms.
Environmentalists are working to plant trees to counteract the effects of deforestation on the ecosystem.
The government implemented policies to counteract the economic downturn and stimulate job growth.
To counteract the negative impact of stress, individuals are encouraged to practice mindfulness and relaxation techniques.
