Doing business with someone involves a variety of activities, such as dealing and selling to them. The term 'do business with' can be broken down into two words: 'DEAL' (4 letters) and 'sellto' (6 letters). Dealing is the process of negotiating and agreeing on terms for a transaction, while sellingto is the act of providing goods or services in exchange for money. Both activities are essential components of doing business with someone.