2waahn ging 環境 — a environment; a background; a situation.
3waahn tauh 環頭 — an area, a territory; an area covered by police on beat; an area controlled by a triad group.
4waahn tauh waahn méih 環頭環尾 — the less prosperous areas at the two ends of Hong Kong Island facing Kowloon; an area where there is not much money to be made (e.g. by a triad society) (djh 408, 26).