Synonyms for Inhibiting:

adj.

hindering (adjective)
restricting, hindering, congesting, Restraining, constraining, frustrating, blocking, Cramping, impeding, thwarting, Delaying, Entrapping, Detaining, Complicating, Clogging, Snagging, crippling, Resisting, baffling, bottleneck, Snarling, burdensome, Deterring, Tangling, Entangling, constipating, Crimping, Encumbering, Damming, Obstructing, Handicapping, choking, Fouling.
oppositional (adjective)
challenging, oppositional, contradictory, Resisting, repelling, interfering, defiant, impeding, Rebuffing, Suppressing, confrontational, conflicting, crossing, protesting, antagonizing, Repulsing, counterattacking, repressing, Counteracting, Objecting, hindering, obstructive, Disputing.

n.

inhibiting (noun)
repressive, inhibitory, restrictive, repressing.

v.

dissuading (verb)
dampening, Checking, banning, Disinclining, disheartening, admonishing, depressing, Dissuading, discouraging, Derailing, intimidating, Deflecting, daunting, Preventing, diverting, chilling, averting, barring, Deterring, Restraining.
hindering (verb)
Hampering, jamming, Paralyzing, Plugging, Bunging, bottlenecking, Staying, Impairing, Hamstringing, catching, Interrupting, curbing, fettering, braking, Miring, dragging, Burdening, stopping.
opposing (verb)
confronting, hindering, Resisting, Objecting, impeding, antagonizing, Disputing, Repulsing, Rebuffing, Contradicting, Intercepting, Defying, interfering, crossing, protesting, counterattacking, repelling, disagreeing, Oppressing, Obstructing, fighting, Suppressing, countering, repressing, challenging, meddling, Counteracting, opposing, conflicting.
prohibiting (verb)
Denying, Disallowing, disqualifying, Refusing, Rejecting, controlling, Outlawing, Precluding, Curtailing, forbidding, Prohibiting, disapproving.
restraining (verb)
constricting, binding, confining, Bridling, Leashing, Tethering, Collaring, Shackling.

Other synonyms:

Other relevant words:
repressive, restrictive, inhibitory.