密封 mì fēng 🔊 to seal up HSK 7–9 + Review this word Meanings mì fēng to seal up Its characters 密mìdense; close; thickHSK 6封fēngto conferHSK 3 Words with 密封 密封舱 mì fēng cāng sealed compartment 密封胶 mì fēng jiāo sealant