壁垒森严 Traditional 壁壘森嚴 bì lěi sēn yán 🔊 closely guarded + Keep this word Meanings bì lěi sēn yán 壁壘森嚴 closely guardedstrongly fortifiedsharply divided Its characters 壁bìwall垒lěirampart森sēndensely wooded严yántight (closely sealed)HSK 6