assure

(verb) make certain of. Synonyms: guarantee, ensure, insure, secure. Examples: "This nest egg will ensure a nice retirement for us." "Preparation will guarantee success!."

(verb) inform positively and with certainty and confidence. Synonyms: tell. Examples: "I tell you that man is a crook!."

(verb) assure somebody of the truth of something with the intention of giving the listener confidence. Examples: "I assured him that traveling to cambodia was safe."

(verb) be careful or certain to do something; make certain of something. Synonyms: see, check, insure, see to it, ensure, control, ascertain. Examples: "He verified that the valves were closed." "See that the curtains are closed." "Control the quality of the product."

(verb) cause to feel sure; give reassurance to. Synonyms: reassure. Examples: "The airline tried to reassure the customers that the planes were safe."

(verb) make a promise or commitment. Synonyms: promise.