The Vietnamese word "bèo" primarily refers to a type of aquatic plant known as "water-fern." It is often found floating on the surface of ponds and lakes.
Thả bèo: This means "to float water-fern" or "to grow water-fern" on a pond.
Băm bèo, thái khoai: This phrase comes from a folk saying and means "to chop up water-fern and slice sweet potato."