· make certain of; "This nest egg will ensure a nice retirement for us"; "Preparation will guarantee success!"

Synonym(s): guarantee, ensure, insure, secure

· inform positively and with certainty and confidence; "I tell you that man is a crook!"

Synonym(s): tell

Hypernym(s): affirm, verify, assert, avow, aver, swan, swear

· assure somebody of the truth of something with the intention of giving the listener confidence; "I assured him that traveling to Cambodia was safe"

Hypernym(s): persuade

· 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, ensure, control, ascertain

Hypernym(s): verify

· cause to feel sure; give reassurance to; "The airline tried to reassure the customers that the planes were safe"

Synonym(s): reassure

Hypernym(s): calm, calm_down, quiet, tranquilize, tranquillize, tranquillise, quieten, lull, still

Antonym(s): worry

· make a promise or commitment

Synonym(s): promise

Hypernym(s): declare