Impact is a noun meaning the action of one object coming forcibly into contact with another.
It can also refer to a marked effect or influence.
As a verb, impact means to come into forcible contact with another object, or to have a strong effect on someone or something.
Common phrases with impact:
1. High-impact - having a large effect
2. Impact factor - a measure of the frequency with which an article is cited
3. Environmental impact - effect on the natural world