Past tense of guestimate; an approximation made without precise measurements or full data.
Regular past tense of the variant 'guestimate' using '-ed.' Follows the same inflectional pattern as 'guesstimate' but with the alternate spelling.
When a new word has variant spellings ('guesstimate' vs. 'guestimate'), the inflected forms multiply the variations—meaning we get both 'guesstimated' and 'guestimated' in actual use, showing how orthographic variation branches through grammar.
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