An archaic or dialectal term meaning a person of different kind or a remarkable person; sometimes used as an exclamation.
From English 'another' + 'guess' (possibly from obsolete sense meaning 'person' or from 'guest'). An obscure English word reflecting regional speech patterns from earlier centuries.
'Anotherguess' is one of those words that linguists love because it reveals how people in different regions and time periods combined words in surprising ways—the meaning keeps shifting depending on context and dialect.
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