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ascertain

[as-er-teyn] /ˌæs ərˈteɪn/
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
1400-1450
1400-50; late Middle English, variant of assertain, acertain < Middle French acertain- (tonic stem of acertener to make certain), equivalent to a- a-5 + certain certain
Related forms
ascertainable, adjective
ascertainably, adverb
ascertainer, noun
ascertainment, noun
nonascertainable, adjective
nonascertainableness, noun
nonascertainably, adverb
nonascertainment, noun
preascertain, verb (used with object)
preascertainment, noun
unascertainable, adjective
unascertainably, adverb
unascertained, adjective
well-ascertained, adjective
Synonym Study
1. See learn.
Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2014.
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Examples from the web for ascertainable
  • First come those plays whose dates of initial performance are ascertainable.
  • If the relief is not readily ascertainable, a judge shall render judgment.
  • No ascertainable structure need exist apart from and in addition to such proof.
  • Issues not reasonably ascertainable during the draft permit public comment period, including the public hearing.
British Dictionary definitions for ascertainable

ascertain

/ˌæsəˈteɪn/
verb (transitive)
1.
to determine or discover definitely
2.
(archaic) to make certain
Derived Forms
ascertainable, adjective
ascertainably, adverb
ascertainment, noun
Word Origin
C15: from Old French acertener to make certain
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition
© William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012
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Word Origin and History for ascertainable
adj.

1783, from ascertain + -able. Related: Ascertainably.

ascertain

v.

early 15c., "to inform, to give assurance," from Anglo-French acerteiner, Old French acertener "to assure, certify" (13c.), from a "to" (see ad-) + certain "certain" (see certain). Modern meaning of "find out for sure by experiment or investigation" is first attested 1794. Related: Ascertained; ascertaining.

Online Etymology Dictionary, © 2010 Douglas Harper
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