浓云密布 nóngyúnmìbù dark clouds cover the sky Origin Definitions Defs Strokes Stroke Words Sentences Sents 浓 濃 nóng adjective dense thick; crowded; lush; (of clouds, smoke, or foliage) having a high physical density云 雲 yún noun cloud cloud; any cloud-like mass of smoke, dust, or steam in the air密布 mìbù to cover densely to be densely spread or covered across an area