Is it farther or further?
1650s, "mathematician skilled in algebraic geometry," from French analyste "a person who analyzes," from analyser (see analysis). As a short form of psychoanalyst, attested from 1914. Greek analyter meant "a deliverer."
analyst an·a·lyst (ān'ə-lĭst)
One that analyzes.
A licensed practitioner of psychoanalysis.