alert car care concern prevent prevention protect protection red risk risk area risky safeguard security sign theft risk vehicle warning warning sign white barred bars caution communicate communication control danger do not do not enter forbidden impede locked notice pipes posted prevented Restrict restricted restriction bar basin bathroom bubbles clean cleanse dirty disinfect faucet germ hand hands hygiene infection Lather rinse sanitize scrub sink soak soaking soap soapy spot sterile tap wash washing water wet woman beach dangers hut lifeguard lifeguard-towers lifeguards look-out lookout lookout-tower observation observe ocean prevent-drownings safety scan scanning seashore shark-spotting shelter structure structures supervise supervision swimmers swimming tower volunteers watch chains fire hydrant old pavement pump abstract background black bumps coloured design equipment floor grunge health no non non-skid non-slip object occupational outdoor outside pad pads path pathway pattern pavers paving plastic rubber shape shiny sidewalk skid slip slipping stone street surface texture traction used walkway battered command compulsory debar directive grungy metal prohibition stop Dirt yellow barbed barrier blue climb clouds dangerous electricity pylon sky wire barrel cannon comic comical concept conceptual condom contraception contraceptive disease free healthcare healthy humor humorous humour humourous image intercourse isolated isolation latex medical message metaphor metaphorical photo photograph picture preventive protective resource safe sex sexuality std stock symbol symbolic symbolism symbolize warn weapon