牛膝 niú xī 🔊 Achyranthes bidentata (root used in… + Review this word Meanings niú xī Achyranthes bidentata (root used in Chinese medicine) Its characters 牛niúoxHSK 3膝xīknee Words with 牛膝 牛膝草 niú xī cǎo hyssop (Hyssopus officinalis)