A bay or a curved indentation of a coastline; or the geological process of forming such an indentation.
From 'embay' combined with the suffix '-ment,' which creates nouns meaning 'the result of an action' or 'the thing itself.'
Geologists specifically use 'embayment' to describe how a coast can have multiple curved indentations—places where the land curves inward—and the term also describes the natural process that creates these features over millennia.
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