adjective - not legally or formally obligatory; not requiring compliance
adjective - not harmful or poisonous to people, animals, or the environment
adjective - not intended to make a financial profit, usually referring to organizations or activities that focus on social, educational, or charitable purposes
adjective - not containing alcohol
adjective - not causing physical or psychological dependence when used regularly
adjective - referring to accommodation where guests prepare their own meals instead of being provided with food
noun - a drawing, painting, photograph, or other artistic representation of oneself, created by the artist
noun - one of the two front legs of a four-legged animal
noun - a woman who was previously in a romantic relationship with someone but is no longer
noun - a substance added to a liquid, especially in engines, to prevent it from freezing in cold temperatures
adjective - avoiding social interaction or behaving in a way that is harmful or disruptive to society
adjective - opposed to the use or development of nuclear weapons or nuclear energy
adjective - designed to detect, prevent, or remove computer viruses and other malicious software