The term 'put in chains' can be defined by four crossword solutions: SHACKLE (7 letters), FETTER (6 letters), enfetter (8 letters), and ENSLAVE (7 letters). A SHACKLE is a metal fastening that is used to secure a person or object, while a FETTER is a chain or manacle used to restrain someone. Enfetter is a verb meaning to put in chains, and ENSLAVE is a verb meaning to make someone a slave. All of these terms refer to the act of restraining someone or something with chains.