to return something to how it was before to restore the system of all the living things in an environment, and the way they connect with each other an ecosystem no longer existing (of an animal or plant) extinct the natural home of an animal or plant a habitat to become well and healthy again after an injury or illness to heal the land along the sides of a river a riverbank to slowly be reduced or disappear to erode an animal that kills and eats other animals a predator solid waste from a person or animal excrement to communicate a message to a lot of people to spread the word