assure

[1]	secure , stabilize , settle , insure , establish , confirm , certify , warrant , guarantee , ensure , be confident of , make/be sure/certain
[2]	encourage , tell , inspirit , reassure , hearten
[3]	convince , persuade , reassure , make (someone) certain , ensure
[4]	assert , see , check , state , asseverate , insure , see to it , promise , control , ascertain