adj. 基本的;必要的;本質(zhì)的;精華的;
n. 必需品;基本要素;必不可少的東西;
?? essent=be存在,本質(zhì) + ial ...的 → 必要的,本質(zhì)的
"The essential thing is that the two of you ought to agree."
根本的問題是你們倆應(yīng)意見一致.
近義:must, necessity, proviso, requirement, requisite, condition
反義:nonissue, needless, pointless, profitless, purposeless, redundant