ascertain
verb (used with object)
to find out definitely; learn with certainty or assurance; determine.
well-ascertained
-
a word derived from
ascertain.
Example Sentences
Examples are provided to illustrate real-world usage of words in context. Any opinions expressed do not reflect the views of Dictionary.com.
Such is the well-ascertained history of the hair-worm, excluding entirely the popular belief in its origin.
From Young Folks' Library, Volume XI (of 20) Wonders of Earth, Sea and Sky by Edward Singleton Holden
These, indeed, do not possess even the degree of evidence which pertains to a well-ascertained empirical law; but admit of refutation on the empirical ground itself, without ascending to casual laws.
From A System Of Logic, Ratiocinative And Inductive by John Stuart Mill
It is, however, a well-ascertained fact that when the force is weak a bright light exerts an interfering action on some of the phenomena.
From Mysterious Psychic Forces An Account of the Author's Investigations in Psychical Research, Together with Those of Other European Savants by Camille Flammarion
All that concerns us is the remarkable literature that has resulted from this well-ascertained psychical condition.
From The Vagabond in Literature by Arthur Rickett
We wish that they may yield to well-ascertained, well-authenticated, and well-secured terms of reconciliation,—not that your Majesty should owe the recovery of your dominions to their total waste and destruction.
From The Works of the Right Honourable Edmund Burke, Vol. 06 (of 12) by Edmund Burke
