The crossword solution for the term 'Prefix with Car or Chic' is ECO, which is a three-letter word. ECO is a prefix that is commonly used to refer to environmentalism and sustainability. It is often used in combination with words such as car or chic to denote environmentally friendly products or practices. For example, an eco-car is a vehicle that has been designed to reduce its environmental impact, while eco-chic is a term used to describe fashion that is produced in an environmentally conscious way.