A useful thing, facility, or condition that makes life easier or more comfortable; archaic or alternative form of 'convenience.'
From Latin 'convenientia' (agreement, fitness), with the English noun suffix '-cy.' This form was standard in Early Modern English but was largely replaced by 'convenience' by the 18th century.
Early modern texts preferred 'conveniency' over 'convenience'—it's a subtle shift showing how English continuously simplifies and smooths out its word forms over centuries!
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