The term 'That Which Is Done' can be summarized as a DEED, which is a four-letter word. A DEED is an act or action that has been done, usually with legal implications. It is often used to refer to the transfer of property from one person to another, such as in a real estate transaction. Deeds are also used to document other types of agreements, such as contracts and wills. In some cases, a DEED may also refer to a document that serves as evidence of a particular action or event.