wū yù
see 荸薺|荸荠[bi2 qi2]
乌
wū
abbr. for country names that begin with 烏|乌[wu1]: Ukraine 烏克蘭|乌克兰[Wu1 ke4 lan2], Uzbekistan 烏茲別克斯坦|乌兹别克斯坦[Wu1 zi1 bie2 ke4 si1 tan3] etc
芋
yù
taro