The term "incorrigible" refers to someone or something that is incapable of being corrected, reformed, or improved. This adjective is often used to describe a person who is resistant to change, particularly in terms of behavior or habits. For example, an incorrigible child might frequently misbehave despite attempts to discipline them. The word can also apply to situations or things that are seen as hopeless or irreparable.
If you need more information or a specific context for using the word, feel free to ask!