boundary, border, region
境 centers on a dividing line or edge that separates areas: a boundary, border, or the region on one side of that line.
境 combines 土 (earth, ground) with 竟, which likely contributes the sound and the idea of ending or limit, together suggesting an earthen boundary.
The left side is earth 土, and the right side 竟 looks like a finished line or limit. Picture a dirt mound marking the end of one region and the start of another: 境 is the boundary.
For キョウ, imagine a border guard shouting 'KYOU!' (like 'kyo') when you reach the boundary: KYOU -> キョウ, and the earth marks the line.
environment; surroundings; circumstances
border (between countries); national border
boundary; border; limit; bounds; frontier
border; boundary
state of mind; mental state; mental attitude
grounds (esp. of shrines and temples); compound; churchyard; precincts
one's circumstances; environment; situation (in life)
Ministry of the Environment
state (of mind); mental state; emotional condition
unexplored region; secluded region; place off the beaten track
borderline; boundary
remote region; outlying district; border district; frontier
difficult situation; adverse circumstances; predicament; trouble; dilemma; distress
adverse circumstances; unfortunate situation; adversity
demon-infested place
prefectural border; prefectural boundary
crossing a border (illegally); border violation; border transgression
distinction; discrimination
living environment; habitat
most interesting part (of a story); climax; good part