hé​shǒu​wū

Chinese knotweed

何首乌 (何首烏) hé​shǒu​wū
Chinese knotweed idiom
Chinese knotweed (Polygonum multiflorum), a species of herbaceous perennial vine native to central and southern China
fleeceflower root noun
the dried root tuber of Polygonum multiflorum, widely used in traditional Chinese medicine to nourish the liver and kidneys and to darken hair

Frequency

Written text
0.786 per million

Sources

Definitions
CC-CEDICT
Frequency data
BCC Corpus (BLCU)