qí
used in 荸薺|荸荠[bi2 qi2]
荸荠
bí qí
Chinese water chestnut (Eleocharis dulcis)
荠苎
jì zhù
(botany) Mosla grosseserrata
荠菜
jì cài
shepherd's purse (Capsella bursa-pastoris)
荠苧
jì níng