react
verbUK /riˈækt/
US /riˈækt/
To do something because of what someone else does or says.
She reacted with a big smile when she saw the puppy.
OTHER MEANINGS
2. To change or behave in a certain way because of something that happens.
The chemicals react when you mix them together.
3. To feel strongly against something you do not like.
Many people reacted badly to the new rules.
4. To become sick or have a bad effect from a medicine or food.
He reacted to the medicine and got a rash.