an annual plant with white or pinkish flowers, often cultivated for its triangular seeds which are ground into flour for food; can also refer to the seeds themselves

Chinese onion, a type of small pickling onion also known as rakkyo or Chinese scallion

The dark outer shell of buckwheat seeds, often used in Northern China as a filling for pillows.

flour made from ground buckwheat

(variant form) a type of small edible onion bulb with a strong odor, often pickled or used in seasoning