A misspelling or rare variant of 'accumulative'; relating to the process of accumulating or building up over time.
Variant of accumulative without the final 'e'; likely a printing error or obsolete spelling from historical texts rather than a standard modern form.
This variant spelling is so rare that it barely exists in modern English—it's the kind of word you'd only encounter in very old books, showing how spelling standardization has cleaned up English over the centuries.
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