· make certain of; "This nest egg will ensure a nice retirement for us"; "Preparation will guarantee success!"
Synonym(s): guarantee, insure, assure, secure
· 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"
Synonym(s): see, check, insure, see_to_it, control, ascertain, assure
Hypernym(s): verify