ascertain


[ad_1] 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.

verb (tr)

  1. to determine or discover definitely
  2. archaic to make certain
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.

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