afford proof of ascertain assure balance ballast bring home to certify cinch clear up clinch counterbalance decide demonstrate determine dismiss all doubt ensure establish find out firm firm up fix follow follow from freeze get at have a case hold hold good hold water immobilize insure keep make certain make good make no doubt make no mistake make out make sure make sure of pin down prove prove to be prove true reassure remove all doubt retain see that see to it set at rest settle settle the matter show sort out stabilitate stabilize steady stick transfix