probator

Etymology

From Latin probātor.

probator means An examiner; an approver. Lexicurio rates it Sui generis — a strength score of 87 out of 100.

noun

An examiner; an approver.“Warranted Officers, that are reckoned ancient experienced Men of the same Employments, some nominated, and appointed for Probators, as well as all from the Captains and Commissioners”
One who, when indicted for crime, confessed it and accused his accomplices in order to obtain pardon.