huáng lián
Chinese goldthread (Coptis chinensis), rhizome used in medicine
yǎ ba chī huáng lián
no choice but to suffer in silence (idiom)
also written 啞巴吃黃蓮|哑巴吃黄莲
(often precedes 有苦說不出|有苦说不出[you3 ku3 shuo1 bu5 chu1])
yǎ ba chī huáng lián , yǒu kǔ shuō bu chū
to be forced to suffer in silence
unable to speak of one's bitter suffering
sometimes written 啞子吃黃連,有苦說不出|哑子吃黄连,有苦说不出