paramount
/ˈpærəmaunt; `pærəˌmaʊnt/ adj
(fml 文) having the greatest importance or significance; supreme最重要的; 最重大的; 至上的
This matter is of paramountimportance. 此事至关重大.
The reduction of unemployment should be paramount in the government's economic policy. 降低失业率应是政府经济政策的头等大事.