décommunautariser

A rare, technical term from EU policy jargon — the reverse of communautariser (transferring a policy area to shared European Union competence), meaning to return a matter to national rather than EU-level authority. Confined almost entirely to specialist political and legal writing.

• Certains responsables politiques souhaitent décommunautariser cette compétence. — Some political leaders want to return this policy area to national control.
• Le traité ne prévoit aucune possibilité de décommunautariser cette matière. — The treaty provides no mechanism to shift this matter back to national authority.
• Décommunautariser une politique européenne reste juridiquement complexe. — Shifting a European policy back to national control remains legally complex.

A dense piece of EU jargon most native French speakers have never used — a learner will only encounter it in specialist political or legal texts about European integration, never in ordinary conversation.