5. prophylactic

adjective. (ˌprɑːfɪˈlæktɪk, ˌproʊfɪˈlæktɪk) Warding off.
Synonyms
fender energizer breathalyser interrupter remote control stylus breathing machine nest egg reflector instrument stemmer indicator breathing apparatus surface damper fan strengthener flare filter decoy launcher shoetree horn corer feeder rapper contrivance applicator heat exchanger sensor drop press lift support afterburner catapult agglomerator mechanism dart thrower key runner prophylactic device diestock widget igniter cryptograph button extinguisher bird feeder snowshoe lure preventative aspergill drive prod foil stabiliser elastic device peeler corrective gadget automatic pilot baby's dummy magnet converter birdfeeder aerofoil pacifier conductor alarm system gismo sweatbox contraceptive reset adaptor plectrum shoehorn groover billiard marker fire extinguisher pull safety device instrumentality prompter guard aspersorium remote router signaling device doorknocker trap storage device stabilizer safety contraceptive device deflector hydrofoil buffer washboard override suction cup electronic device ventilator reinforcement release constraint lighter autopilot dental appliance battery charger comforter interlock memory device shooting stick robot pilot vaporiser adapter dampener lifting device valve airfoil depressor warning device electrical device applier gas fixture trigger moistener restorative water cooler cutoff knocker convertor teething ring preventive holding device restraint spear thrower synchroflash clip-on source of illumination straightener Kinetoscope drop forge fumigator take-up acoustic device paper feed teaser plectron sounder throwing stick ignition interlock throwing board bootjack toy control surface asphyxiator detector sensing element exercise device optical device drop hammer jig shredder instrumentation light tongs ignitor bait tilter blower comb explosive device musical instrument muffler goad heater power takeoff PTO noisemaker gizmo energiser birth control device machine pair of tongs contraption breathing device breathalyzer convenience warmer crusher alarm bubbler autocue scratcher imprint keyboard pick vaporizer appliance charger