俗 （ゾク） layman (esp. as opposed to a Buddhist monk), laity, man of the world, the world, local manners, modern customs, common, popular, vulgar, low

俗語 （ゾクゴ） colloquialism, colloquial language, slang

民俗 （ミンゾク） folk customs, folkways, ethnic customs

低俗 （テイゾク） vulgar, lowbrow, coarse