low-key(Some families are really flashy and obnoxious about their wealth, they live in glitzy neighbourhoods, but there are even more of those who prefer a low-key lifestyle. – предпочитают не привлекать к себе внимания / вести скромный образ жизниART Vancouver)
discreetly(Hi Carol, if you see something like this again that you would like to discreetly report, you can text Transit Police at 87-77-77 when it is happening. ART Vancouver)
discreet(Millionaires like to be discreet. -- Миллионеры стремятся не привлекать к себе излишнего внимания.
• Most wealthy people try to be discreet with their money.ART Vancouver)