crowning
adjective uk/ˈkraʊ.nɪŋ/ us/ˈkraʊ.nɪŋ/
（事件，成就）最伟大的，最重要的
A crowning event or achievement is the best or most important one.
the crowning achievement of her long career 她漫长职业生涯的最高成就
Walking on the moon was his crowning glory (= his most important achievement). 在月球上行走是他的无上荣耀。