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proprietary

mastery

UK /pɹəˈpɹaɪ.ə.tə.ɹi/ US /pɹəˈpɹaɪ.əˌtɛɹ.i/adjnoun

card 1 of 10 · synonym

Which word is closest in meaning to 'proprietary' in this sentence?

The chef's proprietary blend of spices made the dish unforgettable.