The act of completing something, or the feeling of satisfaction and happiness when you've achieved something meaningful.
From the verb 'fulfill,' which comes from Old English 'fullfyllan,' combining 'full' and 'fyllan' (to fill). The suffix '-ment' creates a noun form. The British spelling is 'fulfilment' while American English uses 'fulfillment.'
Interestingly, 'fulfilment' and 'fulfillment' are both correct, depending on whether you use British or American English—but American English actually doubles the 'l' even though the original word only had one! This quirk shows how spelling 'reforms' don't always stick.
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