English: frustration
Welsh: llesteirio
Subject: Cyfraith
Welsh 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.
Welsh 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.