Third-person singular present tense of fulfill; to complete, satisfy, or bring to realization.
From Old English 'fulfyllan' (to fill full), combined with '-s' for third-person singular, used in English since at least the 13th century.
The British spelling 'fulfils' versus American 'fulfills' reveals a fascinating pattern—British English tends to preserve simpler consonant doubling rules from older traditions, while American English regularized the doubling, even though both pronunciations are identical.
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