Present participle of guestimate; the process of making rough estimates without complete information.
Regular '-ing' participle formation of the variant spelling 'guestimate.' Maintains the same functional properties as 'guesstimating.'
The '-ing' form remains consistent across spelling variants—both 'guesstimating' and 'guestimating' would be pronounced identically and function the same way, but orthographic variation reminds us that spelling doesn't always follow pronunciation perfectly in English.
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