The crossword solution for the term 'injure permanently' is 'INCAPACITATE, ' which is a 12-letter word. INCAPACITATE means to render someone unable to act or function normally, either temporarily or permanently. It is often used in a medical context to describe a person's inability to perform certain activities due to physical or mental impairment. In a legal context, it can refer to a person's inability to make decisions or take action due to a disability or other condition.