to make sure or certain: CONVINCE. to inform positively. to make certain the coming or attainment of: GUARANTEE. to make safe (as from risks or against overthrow): INSURE. to give confidence to.
to make sure or certain: CONVINCE. to inform positively. to make certain the coming or attainment of: GUARANTEE. to make safe (as from risks or against overthrow): INSURE. to give confidence to.