～圏
～けん · ～ken · JLPT N2 · noun
area
🌐 Sounds like ken, as in beyond my ken: the sphere you know
The kanji is 囗 (an enclosure) wrapped around 巻 (to roll up), so it means a ring drawn around an area. As a suffix it marks a zone: 首都圏 (shutoken) is the capital area, and 英語圏 (eigoken) is the English-speaking world.