A more thorough explanation:

Definition: Cadena is a Spanish word that means "chain." In Spanish law, it refers to a period of imprisonment. In the past, it also meant confinement at hard labor while chained from waist to ankle.

Examples:

• Cadena perpetua: This means life imprisonment.
• Cadena temporal: This means imprisonment for a term less than life.

The examples illustrate how cadena is used in Spanish law to refer to different types of imprisonment. Cadena perpetua means life imprisonment, while cadena temporal means imprisonment for a term less than life.