enhancer
noun [ C ] uk/ɪnˈhɑːn.sər/ us/ɪnˈhæn.sɚ/
起提高（或增强）作用的事物（通常用作构词成分）
something that is used to strengthen or improve the quality of something. Enhancer is usually used as a combining form
Music can be a mood enhancer. 音乐可以调节心情。
I don't like to use artificial flavour-enhancers in my cooking. 我做饭不喜欢用人工调料。