ascertain

ascertain (http://definr.com/ascertain)

     v 1: after a calculation, investigation, experiment, survey, or
          study; "find the product of two numbers"; "The physicist
          who found the elusive particle won the Nobel Prize"
          [syn: determine, find, find out]
     2: be careful or certain to do something; make certain of
        something; "He verified that the valves were closed"; "See
        that the curtains are closed"; "control the quality of the
        product" [syn: see, check, insure, see to it, ensure,
         control, assure]
     3: find out, learn, or determine with certainty, usually by
        making an inquiry or other effort; "I want to see whether
        she speaks French"; "See whether it works"; "find out if
        he speaks Russian"; "Check whether the train leaves on
        time" [syn: determine, check, find out, see, watch,
         learn]
     4: learn or discover with certainty