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Stage 1 of 3
aestus
Latin · ancient
"tide, boiling"
tide, heat, boiling
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Stage 2 of 3
aestuarium
Latin · ancient
"a tidal marsh or inlet"
a tidal marsh or inlet, from aestus (tide)
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Stage 3 of 3
estuary
English · 1530s
"the tidal mouth of a large river"
settled as the English word for the tidal mouth of a river
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