Part of speech: Noun
the choicest or most essential or most vital part of some idea or experience
Example: the gist of the prosecutor's argument; the heart and soul of the Republican Party; the nub of the story
Part of speech: Noun
the central meaning or theme of a speech or literary work
Substance, Gist, Essence, Heart and soul, Pith
The word "gist" comes from Latin iaceō, which comes from Old French gist. Many other languages have similar words:
Roman military conquests permanently planted Latin vocabulary across three continents.