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speculate

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verb British English pronunciation: speculate /ˈspekjʊleɪt/ 
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present tense
I/you/we/theyspeculate
he/she/itspeculates
present participlespeculating
past tensespeculated
past participlespeculated
  1. 1
    [intransitive/transitive] to consider or discuss why something has happened or what might happen
    speculate on/about:

    We can only speculate on the reasons for his sudden resignation.

    speculate that:

    Archaeologists speculate that people first reached the islands over 1,000 years ago.

derived word

speculator

 British English pronunciation: speculator  noun [countable]
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singularspeculator
pluralspeculators

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