Source : Webster's Revised Unabridged Dictionary (1913)

Inoperative \In*op"er*a*tive\, a. [Pref. in- not + operative.]
   Not operative; not active; producing no effects; as, laws
   renderd inoperative by neglect; inoperative remedies or
   processes.

Source : WordNet®

inoperative
     adj : not operating; "an inoperative law" [ant: {operative}]