ascertainer

English

Etymology

From ascertain +‎ -er.

Noun

ascertainer (plural ascertainers)

1. One who, or that which, ascertains.
   • 2009, Aviva Ben-Ur, Sephardic Jews in America: A Diasporic History, page 109:

     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.

Anagrams

• reascertain, secretarian