闭门觅句

閉門覓句
bìménmìjù
lit. lock the door and search for the right word (idiom); fig. the serious hard work of writing

CEDICT

关起门来，单凭想像作诗。

重編國語辭典

Entry Composition

1 闭门 bìmén to close a door
2 觅句 mìjù to search for the right word (of poet)