Permanent is an adjective meaning lasting or intended to last or remain unchanged indefinitely.
Common usages include:
1. Permanent marker - a type of pen with ink that cannot be easily erased
2. Permanent resident - a person who has the right to live indefinitely in a country of which they are not a citizen
3. Permanent wave - a hairstyle produced by setting the hair in waves or curls and treating it with chemicals so that the style lasts for several months
4. Permanent magnet - a magnet that retains its magnetic properties in the absence of an inducing field or current