flood

n. 洪水,水灾
v. 淹没,溢出
vi. 大量涌到,泛滥
vt. 灌溉,淹没

Every spring the river floods the valley.

每年春天河水把山谷淹没。

Settlers flooded from Europe to America in the 19th century.

十九世纪欧洲移民纷纷涌到了美国。