Past tense of abound; existed or occurred in large quantities or great numbers.
From Old French 'abonder,' from Latin 'abundare' (to overflow), combining 'ab-' (away/from) + 'undare' (to wave/surge); the past tense uses standard -ed ending.
The word 'abound' comes from the image of something overflowing like ocean waves—so when resources 'abounded,' medieval people imagined them literally surging around them.
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