Verb

(extrapolat)

To infer by extending known information.

*

With fresh material, taxonomic conclusions are leavened by recognition that the material examined reflects the site it occupied; a herbarium packet gives one only a small fraction of the data desirable for sound conclusions. Herbarium material does not, indeed, allow one to extrapolate safely: what you see is what you get

(mathematics) To estimate the value of a variable outside a known range from values within that range by assuming that the estimated value follows logically from the known ones

Verb

(presag)

To predict or foretell something.

* Shakespeare

My dreams presage some joyful news at hand.

* {{quote-news, year=2012, date=November 7, author=Matt Bai, title=Winning a Second Term, Obama Will Confront Familiar Headwinds, work=New York Times citation

, passage=That brief moment after the election four years ago, when many Americans thought Mr. Obama’s election would presage a new, less fractious political era, now seems very much a thing of the past. }}

To make a prediction.

To have a presentiment of; to feel beforehand; to foreknow.