Start from Square One is a phrase that is used to describe the process of beginning something from the very beginning. It is often used when referring to starting a project or task over again, or starting something new. The term 'REDO' is a four-letter word that is used to describe the act of doing something again, usually with the intention of improving it. Redoing something can be seen as a form of starting from square one, as it involves going back to the beginning and making changes.