noun Date: circa 1538 an annual European smartweed ( Polygonum hydropiper ) of moist soils with extremely acrid peppery juice that is naturalized in North America
WATER PEPPER
Meaning of WATER PEPPER in English
Merriam Webster. Explanatory English dictionary Merriam Webster. Толковый словарь английского языка Мерриам-Уэбстер. 2012