Ringfencing refers to the act of protecting or separating something from outside influence or interference. Synonyms for ringfence include isolate, insulate, protect, segregate, separate, quarantine, defend, shield, and fence off. Ringfencing is commonly used in finance to describe the separation of activities within a financial institution to protect customer deposits and maintain financial stability. It can also be used in a personal or professional setting to describe the protection of assets or projects from external threats or distractions. In summary, synonyms for ringfence all indicate an act of protecting something from external factors that could potentially harm it.