Plural of eminency; high points, peaks, or people of high rank or importance.
From Latin eminentia (a standing out, prominence), from eminere (to stand out). The suffix -cy/-ness was added to create abstract nouns meaning the quality of being eminent or outstanding places.
The word captures an interesting linguistic pattern: eminency is actually the older English form for what we now call 'eminence,' showing how words compete and eventually one becomes dominant—kind of like how some species outcompete others in nature.
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