Darbies is a colloquial term that is typically used to refer to handcuffs or restraints. However, there are several synonyms that can be used to describe this term. Some of the most common synonyms include shackles, cuffs, manacles, fetters, and irons. These terms are often used interchangeably to describe the same thing, but they can vary in meaning depending on the context in which they are used. Synonyms like fetters, manacles, and irons can be used to describe heavy restraints that are typically used on convicted criminals, while terms like cuffs and shackles may be used more commonly to describe the restraints used by law enforcement officers in the course of their duties.