陣 means “battle camp, formation”

じん · jin

Also: camp, battle array, ranks, position

On'yomi (Chinese reading)
ジン

JLPT N1 · Taught in secondary school · 10 strokes

The story

Chariots (車) drawn up along a hillside (阝): an army in battle array. A team huddles in an 円陣 before kickoff, a crowd of reporters is a 報道陣, and a prime minister's 退陣, pulling back the camp, is stepping down.

Used in 陣地 (jinchi, military position), 円陣 (enjin, huddle/circle), and 退陣 (taijin, stepping down/resignation)

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Readings from KANJIDIC2, © EDRDG, CC BY-SA.