estuary
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noun (plural estuaries)
the tidal mouth of a large river, where the tide meets the stream.
(潮の干満のある幅の広い)河口; 入り江.
DERIVATIVES
estuarial | ˌesCHo͞oˈe(ə)rēəl | adjective
estuarine | ˈesCHo͞oəˌrīn, ˈesCHo͞oəˌrēn | adjective
ORIGIN
mid 16th century (denoting a tidal inlet of any size): from Latin aestuarium ‘tidal part of a shore’, from aestus ‘tide’.