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ascertainer

 - 2 dictionary results

as⋅cer⋅tain

  [as-er-teyn]
Use ascertainer in a Sentence
–verb (used with object)
1. to find out definitely; learn with certainty or assurance; determine: to ascertain the facts.
2. Archaic. to make certain, clear, or definitely known.
Origin:
1400–50; late ME, var. of assertain, acertain < MF acertain- (tonic s. of acertener to make certain), equiv. to a- a- 5 + certain certain

Related forms:
as⋅cer⋅tain⋅a⋅ble, adjective
as⋅cer⋅tain⋅a⋅bly, adverb
as⋅cer⋅tain⋅er, noun
as⋅cer⋅tain⋅ment, noun

Synonyms:
1. See learn.
Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2009.
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Word Origin & History

ascertain 
1417, "to inform, to give assurance," from O.Fr. acertener "to assure," from a "to" + certain "certain" (see certain). Modern meaning of "to find out for sure by experiment or investigation" is first attested 1794.
Online Etymology Dictionary, © 2001 Douglas Harper
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