Before revision: Although the Oxford English Dictionary suggests it is a variant of spoondrift based on the way that word was pronounced in southwest Scotland, from spoon or spoom ("to sail briskly with the wind astern, with or without sails hoisted") and drift ("a mass of matter driven or forced onward together in a body, etc., especially by wind or water"), this is doubted by the because spoondrift is attested later than spindrift and it seems unlikely that the Scots spelling would have superseded the English one, and because the early use of the word in the form spenedrift by James Melville (1556–1614) is unlikely to have derived from spoondrift.
After revision: ,Although the Oxford English Dictionary suggests it is a variant of spoondrift based on the way that word was pronounced in southwest Scotland, from spoon or spoom ("to sail briskly with the wind astern, with or without sails hoisted") and drift ("a mass of matter driven or forced onward together in a body, etc., especially by wind or water"), this is doubted by the because spoondrift is attested later than spindrift and it seems unlikely that the Scots spelling would have superseded the English one, and because the early use of the word in the form spenedrift by James Melville (1556–1614) is unlikely to have derived from spoondrift.