noun
polishing one's writing; repeatedly refining a text
A yojijukugo describing the act of carefully and repeatedly revising a piece of writing, especially the choice of words. Often used in literary or academic contexts.
彼は詩の完成まで月下推敲を重ねた。
He repeatedly polished his poem until it was finished.
この小説は何度も月下推敲された跡が感じられる。
You can feel the traces of repeated revision in this novel.