An abundant flow or stream of something; the state of flowing toward or converging; abundance or wealth.
From Latin affluentia (from affluere, 'to flow toward'). The suffix -cy creates abstract nouns from adjectives. Closely related to affluence but emphasizing the flowing quality.
The difference between 'affluence' (having wealth) and 'affluency' (the flowing together of resources) shows how synonyms in English aren't truly identical—they emphasize different aspects of the same concept.
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