廓 （クルワ） district, quarter, enclosure, area enclosed by earthwork, red-light district, wide and empty

廓清 （カクセイ） purification, cleaning up, purging

外郭 （ガイカク） outer wall (e.g. castle), outer block (enclosure), outline, contour

遊郭 （ユウカク） (licensed) red light district

廓 （くるわ） district, quarter, enclosure, area enclosed by earthwork, red-light district, wide and empty

郭言葉 （くるわことば） sociolect or secret language used by prostitutes in red-light districts (Edo period), vulgar words used by prostitutes (Edo period)