reduction
process of thickening and intensifying the flavor of a liquid mixture such as a soup, sauce, wine, or juice by simmering or boiling
en-US/ɹɪˈdʌkʃən/
en-GB/ɹɪˈdʌkʃn/
process of thickening and intensifying the flavor of a liquid mixture such as a soup, sauce, wine, or juice by simmering or boiling