insure

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

     v 1: 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, see to it, ensure,
           control, ascertain, assure]
     2: make certain of; "This nest egg will ensure a nice
        retirement for us"; "Preparation will guarantee success!"
        [syn: guarantee, ensure, assure, secure]
     3: protect by insurance; "The insurance won't cover this" [syn:
         cover, underwrite]
     4: take out insurance for