名詞 lagoon:

1. a body of water cut off from a larger body by a reef of sand or coral
   同義詞：laguna, lagune

la.goon

n.（名詞）
A shallow body of water, especially one separated from a sea by sandbars or coral reefs.
環(huán)礁湖，瀉湖：一片淺水湖，尤指在海中由被河口的沙洲或珊瑚礁圍成的
A shallow body of liquid waste material, as one in a dump.
一洼廢水：由廢棄物質(zhì)充斥的淺水體，如在垃圾堆中

來源：
French lagune
法語 lagune
Italian laguna
意大利語 laguna
both from Latin lacôna [pool, hollow, gap]
都源自 拉丁語 lacôna [水池，中空，裂縫]
from lacus [lake]
源自 lacus [湖泊]