Source : Webster's Revised Unabridged Dictionary (1913)

Unactive \Un*ac"tive\, a.
   Inactive; listless. [R.]

         While other animals unactive range.      --Milton.

Unactive \Un*ac"tive\, v. t. [1st pref. un- + active; or from
   unactive, a.]
   To render inactive or listless. [Obs.] --Fuller.