ascertainer

Etymology

From ascertain + -er.

ascertainer means One who, or that which, ascertains. Lexicurio rates it Sui generis — a strength score of 87 out of 100.

noun

One who, or that which, ascertains.“Dahbany-Miraglia argues that in the Middle East religion was the dominant criterion of ethnic categorization, whereas in the United States skin color and other physical markers often prevailed as ascertainers of Jewishness.”