Gathers together in increasing amounts; piles up or collects over time into a larger total or mass.
From Latin 'accumulare' (to heap up), from 'ad-' (to) + 'cumulus' (heap, pile). Entered English in the 16th century from scientific and mathematical discourse.
Small habits accumulate into big life changes—just 1% improvement daily compounds to 37x better in a year, which is why compound interest is so powerful and why tiny bad habits become huge problems.
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