prognosticate - definition and synonyms

verb [transitive] very formal 

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/prɒɡˈnɒstɪkeɪt/
present tense
I/you/we/theyprognosticate
he/she/itprognosticates
present participleprognosticating
past tenseprognosticated
past participleprognosticated
  1. to say what you think will happen in the future

derived word

prognostication

 

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/prɒɡˌnɒstɪˈkeɪʃ(ə)n/
noun [countable/uncountable]
singularprognostication
pluralprognostications