Unessential /(?)/

Un·es·sen·tial

Unessential

a.
  1. Not essential; not of prime importance; not indispensable; unimportant.
  2. Void of essence, or real being. [R.]

Unessential

n.
  1. Something not constituting essence, or something which is not of absolute necessity; as, forms are among the unessentials of religion.