unself

un- +‎ self

unself (countable and uncountable, plural unselves)

1. That which is not the self.
   • 2003, Daniel Albright, Beckett and Aesthetics, page 149:

     Beckett's text for Neither is a fantasia on limbo, on the no-man's-land between self and unself, subject and object, where we are all forced to dwell: […]

• nonself

unself (third-person singular simple present unselfs, present participle unselfing, simple past and past participle unselfed)

1. (transitive) To deprive of, or detach from, the self.