Plural of guesstimate; multiple rough estimates or approximations made without precise data.
Plural form of the portmanteau 'guesstimate,' following standard English pluralization of both noun and verb forms (third-person singular present).
The fact that 'guesstimates' can function as both a plural noun AND a present-tense verb (she guesstimates the cost) shows how flexibly English handles words, particularly recent coinages that haven't developed specialized grammatical restrictions.
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