British spelling of driveled; past tense of drivel.
British English spelling convention that doubles the final consonant before adding '-ed' when the word is one syllable with a short vowel. Same root as 'drivel' (Old English 'drifol').
British and American English split on this word: Americans write 'driveled' but the British write 'drivelled'—a perfect example of how the two languages diverged after 1776, each developing their own spelling rules.
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