An archaic or obsolete form of 'abundance'; great plenty or a large quantity of something.
From Old French 'abondance', derived from Latin 'abundantia' (fullness, plenty). The 'ab-' prefix means 'to' and 'undare' means 'to wave', suggesting overflowing like waves. This French spelling was used in Middle English before 'abundance' standardized.
Medieval manuscripts show 'abondance' as the normal spelling, and you can see it in Chaucer's writings—it's the ancestor of modern 'abundance', and watching it evolve shows how languages simplify over centuries.
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