8 letters · 10 points in Scrabble
noun a person regarded as nonexistent and having no rights; a person whose existence is systematically ignored (especially for ideological or political reasons)
originFrom un- + person. Coined by George Orwell in 1949 as part of the Newspeak in his novel Nineteen Eighty-Four, where it refers to a person who has been executed or has fallen out of favor; whose entire history has been erased.
Etymology from Wiktionary, CC BY-SA 3.0