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Definition: Terminate a contract as a result of an event that either renders its performance impossible or illegal or prevents its main purpose from being achieved.
Context: Nid oes dim yn yr adran hon yn effeithio ar — (a) unrhyw hawl sydd gan y landlord neu ddeiliad y contract i ddad-wneud y contract, na (b) gweithrediad cyfraith llesteirio.
