noun, の adjective
Each ground is its own ground. It is each area or various areas.
This is a jukugo word, which usually means on'yomi readings from the kanji. If you know the readings of your kanji you'll know how to read this as well.
Wanikani users are in various areas of the world.
When I turned on TV, they were just reporting that day's weather in each area.
My family had to move from place to place because of my dad’s job.