unaffect

Etymology
, perhaps a.

Verb

 * 1)  To not affect.
 * 2) * 1911, The Hahnemannian Monthly, volume 46, page 796, excerpting from St. Louis Medical Review:
 * Griffith contends that properly applied the dressing described should afford relief from the moment of its application, and may be worn continuously for from one to six or eight weeks, bathing seeming to unaffect the adhesive properties of the plaster after once having set.