confirmātor, ōris, m. [confirmo], he who confirms or establishes a thing; hence,
I Pecuniae, a surety, security , Cic. Clu. 26, 72: venditionis, Jul. Epit. Nov. c. 3, § 10.—
II Trop.: sententiae, Lact. 1, 2 init. : erroris, Tert. adv. Marc. 4, 36.
cōnfīrmātor ōris, m confirmo, he who assures : pecuniae, a surety . ...
An Elementary Latin Dictionary
·noun One who, or that which, confirms; a confirmer. ...
Webster's Dictionary of the English Language