Euthanasia is a term used to describe the act of intentionally ending the life of an individual in order to relieve them from pain or suffering. Euthanizing can be done through different methods, including lethal injection, suffocation, and poisoning. The word "euthanized" refers specifically to the action of putting an animal to sleep for humane reasons, usually because they are sick or injured beyond recovery, or if their quality of life is significantly compromised.