The Collaborative International Dictionary of English v.0.48:
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. InopercularWordNet (r) 3.0 (2006):
inoperative adj 1: not working or taking effect; "an inoperative law" [ant: operative]