This is the 4979th most frequent Japanese word.
粗筋
Summary; outline of a story.
Here, '粗筋' is used to refer to a summary or synopsis of a movie's story.
映画の粗筋を教えてください。
Please tell me the plot of the movie.
In this sentence, '粗筋' denotes the synopsis or general outline of the book's content.
彼は理解を深めるために本の粗筋を読んだ。
He read the summary of the book to deepen his understanding.
Here, '粗筋' is used to indicate the overview or abstraction summarizing the paper's core ideas.