Is it farther or further?
1797, denoting the language group that includes Hebrew, Arabic, Aramaic, Assyrian, etc.; 1826 as "of or pertaining to Semites," from Medieval Latin Semiticus (source of Spanish semitico, French semitique, German semitisch), from Semita (see Semite). As a noun, as the name of a linguistic family, from 1813. In non-linguistic use, perhaps directly from German semitisch. In recent use often with the specific sense "Jewish," but not historically so limited.