estuary

名词 estuary:

1. the wide part of a river where it nears the sea; fresh and salt water mix

1. The river opens out suddenly into a broad estuary.
   江面忽然开阔起来，形成一个宽广的河。
2. A stretch of water in a river, an estuary, or a tidal channel made rough by waves meeting an opposing current.
   巨澜在河流、港湾或潮汐海峡中，由波浪和它对立的水流相撞而成的一条绵延水域
3. The stream debouches into the estuary.
   这条河流入河口湾。
4. The ship has touched bottom the estuary must be shallower than we thought.
   船搁浅了--这河口的水比我们想像的要浅。

es.tu.ar.y

n.（名词）
【复数】 es.tu.ar.ies
The part of the wide lower course of a river where its current is met by the tides.
港湾，河口湾：河流的低凹地区，在此水流与潮汐相遇
An arm of the sea that extends inland to meet the mouth of a river.
海湾：海洋伸进大路与河口相遇的分支

来源：
Latin aestu3rium
拉丁语 aestu3rium
from aestus [tide, surge, heat]
源自 aestus [潮汐，汹涌，发烧]

【引伸】
es.tuar.ial