prognosticate
verb (used with object)
to forecast or predict (something future) from present indications or signs; prophesy.
Used to describe an action that began in the past, has continued continuously, and is still in progress.
Examples are provided to illustrate real-world usage of words in context. Any opinions expressed do not reflect the views of Dictionary.com.
Had old Grim been on board he would have been prognosticating dire disaster, but as he had gone away in the boat, he knew better than anybody else on board, what had happened.
From Sunshine Bill by William Henry Giles Kingston