門外不出 もんがいふしゅつ Meanings Noun, の-adjective (treasuring something by) never taking (it) off the premises Kanji 門 gate. Read as モン. 外 outside. Read as ガイ. 不 un- 出 out. Read as シュツ. Word lists Yojijukugo (四字熟語) Jinuma: Japanese Dictionary · Word lists