(계) [gye] – boundary;

Strokes: 9
Etymology
— field;
— to lie between; to assist; to connect;
Stroke order
界 order

Words with Hanja character 界

경계

Boundary - 境界 [gyeong-gye]

세계

world – 世界 [segye]

영계

spiritual world – 靈界 [yeong-gye]