"the gist of the prosecutor's argument" "the heart and soul of the Republican Party" "the nub of the story"
The whole tradition is in its essence monastic.
He is neither cannibal nor laundryman, these are mere names, they do not touch his essence.
牛津高阶第八版
美国韦氏词典
Dictionary.com
Free Dictionary
维基百科 (自由的百科全书)